Malakozoologische Blätter - Menke, Karl Theodor, 1791 -1861 (T. Fischer, 1881)

Malpighia :rassegna mensuale di botanica - Penzig, O. (Ottone), 1856 -1929 (g. Capra & co, 1906)

The mammals of Chile - Osgood, Wilfred Hudson, 1875 -1947 (Field Museum of Natural History, 1943)

Mammals of the La Selva-Braulio Carrillo Complex, Costa Rica - Timm, Robert M. (U.S. Dept. of the Interior, Fish and Wildlife Service, 1989)

Management plans : with special reference to the national forests - Eldredge, I. F. (Inman Fowler), 1883 -1963 (U.S. Dept. of Agriculture, 1928)

Manglares de México : extensión, distribución y monitoreo - Acosta Velázquez, Joanna (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2013)

Mantissa in volumen primum [-tertium] :Systematis vegetabilium caroli a Linné : ex editione Joan. Jac. Roemer et Jos. Aug. Schultes - Schultes, Joseph August, 1773 -1831 (Sumtibus J.G. Cottae, 1827)

A manual and dictionary of the flowering plants and ferns - Willis, J. C. (John Christopher), 1868 -1958 (University Press, 1904)

A manual and dictionary of the flowering plants and ferns - Willis, J. C. (John Christopher), 1868 -1958 (University Press, 1908)

Manual de plantas de Costa Rica - Hammel, Barry Edward, 1946 - (Missouri Botanical Garden, 2004)

Manual de plantas de Costa Rica - Hammel, Barry Edward, 1946 - (Missouri Botanical Garden, 2003)

A manual flora of Madeira and the adjacent islands of Porto Santo and the Desertas - Lowe, Richard Thomas, 1802 -1874 (John Van Voorst, 1868)

Manual of agricultural chemistry - Ingle, Herbert. (Scott, Greenwood, 1902)

A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants - Balfour, John Hutton, 1808 -1884 (A. and C. Black, 1875)

A manual of botany: being an introduction to the study of the structure, physiology, and classification of plants - Balfour, John Hutton, 1808 -1884 (J. J. Griffin [etc.] 1851, 1851)

Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata - Hyatt, Alpheus, 1838 -1902 (Published by the Author, 1888)

Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata - Hyatt, Alpheus, 1838 -1902 (Published by the Author, 1889)

Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata - Hyatt, Alpheus, 1838 -1902 (Published by the Author, 1897)

Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata - Hyatt, Alpheus, 1838 -1902 (Published by the Author, 1899)

A manual of materia medica and therapeutics including the preparations of the pharmacopoeias of London, Edinburgh, and Dublin, with other approved medicines - Royle, J. Forbes (John Forbes), 1798 -1858 (John Churchill, 1856)

A manual of materia medica and therapeutics including the preparations of the British pharmacopoeia (1867), and many other approved medicines - Royle, J. Forbes (John Forbes), 1798 -1858 (John Churchill & Sons, 1868)

A manual of poisonous plants : chiefly of eastern North America : with brief notes on economic and medicinal plants, and numerous illustrations - Pammel, L. H. (Louis Hermann), 1862 -1931 (Torch Press, 1911)

A manual of poisonous plants : chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations - Pammel, L. H. (Louis Hermann), 1862 -1931 (Torch Press, 1910)

A manual of poisonous plants : chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations - Pammel, L. H. (Louis Hermann), 1862 -1931 (The Torch Press, 1911)

A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations - Pammel, L. H. (Louis Hermann), 1862 -1931 (The Torch Press, 1911)

A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations - Pammel, L. H. (Louis Hermann), 1862 -1931 (The Torch press, 1911)

A manual of scientific terms, pronouncing, etymological, and explanatory, chiefly comprising terms in botany, natural history, anatomy, medicine, and veterinary science, with an appendix of specific names. Designed for the use of junior medical students, and others studying one or other of these sciences - Stormonth, James, 1824 -1882 (Maclachlan and Stewart, 1885)

The manufacture of chocolate and other cacao preparations - Schaeffer, Herm. (Hermann) (M. Krayn, 1915)

Manuscript notes on avian types - Wetmore, Alexander, 1886 -1978 (1933)

Materia medica of vegetable and animal origin with notes on the pharmacy of official drugs - Humphrey, John, 1862 - (Henry Kimpton, 1907)

Materiali per una malacostatica di terra e di acqua dolce dell'Argentinia meridionale - Strobel, Pellegrino, 1821 -1895 (Biblioteca malacologica, 1874)

Matériaux pour une faune malacologique des Iles Canaries - Mabille, Jules, 1831 -1904 (Museum d'histoire naturelle, 1884)

El médico botánico criollo - Grosourdy, René de. (F. Brachet, 1864)

Meals medicinal : with "herbal simples, " (of edible parts) curative foods from the cook ; in place of drugs from the chemist - Fernie, William Thomas, 1830 - (J. Wright, 1905)

Meals medicinal :with "herbal simples, " (of edible parts) curative foods from the cook ; in place of drugs from the chemist - Fernie, William Thomas, 1830 - (J. Wright, 1905)

Meals medicinal with "herbal simples" (of edible parts) : curative foods from the cook in place of drugs from the chemist - Fernie, William Thomas, 1830 - (John Wright, 1905)

Medical and economical botany - Lindley, John, 1799 -1865 (Bradbury and Evans, 1849)

Medical and oeconomical botany - Lindley, John, 1799 -1865 (Bradbury & Evans, 1849)

Medical botany : containing systematic and general descriptions, with plates of all the medicinal plants, comprehended in the catalogues of the materia medica, as published by the Royal Colleges of Physicians of London, Edinburgh, and Dublin, together with the principal medicinal plants not included in those pharmocopoeias, accompanied with a circumstantial detail of their medicinal effects, and of the diseases in which they have been most successfully employed - Hooker, William Jackson, Sir, 1785 -1865 (J. Bohn, 1832)

Medical botany; or, illustrations and descriptions of the medicinal plants of the London, Edinburgh, and Dublin pharmacopoeias: Comprising a poular and scientific account of poisonous vegetables indigenous to Great Britain - Stephenson, John, 1790 -1864 (Printed for J. Churchill, 1834)

Medicinal plants. Being descriptions with original figures of the principal plants employed in medicine and an account of the characters, properties, and uses of their parts and products of medicinal value - Trimen, Henry, 1843 -1896 (J. & A. Churchill, 1880)

Meereskunde - Friedrich-Wilhelms-Universität Berlin. Institut für Meereskunde. (E.S. Mittler, 1911)

Mélanges biologiques tirés du Bulletin de l'Académie impériale des sciences de St. Pétersbourg - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (Eggers et comp, 1880)

Melastomacearum, quae in Musaeo Parisiensi continentur monographicae descriptionis et secundum affinitates distributionis tentamen - Naudin, Charles, 1815 -1899 (V. Masson, 1853)

Memoir of a tour to northern Mexico :connected with Col. Doniphan's expedition, in 1846 and 1847 - Wislizenus, F. A. (Frederick Adolph), 1810 -1889 (Tippin & Streeper, printers, 1848)

Memoir on the physical and political geography of New Granada - Dwight, Theodore, 1796 -1866 (T. Dwight, 1853)

Mémoires de l'Académie impériale des sciences de St.-Pétersbourg. 7e série - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (L'Académie, 1865)

Mémoires de l'Académie impériale des sciences de St.-Pétersbourg. 7e série - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (L'Académie, 1866)

Mémoires du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (G. Dufour, 1818)

Mémoires du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (G. Dufour, 1822)

Mémoires du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (G. Dufour, 1823)

Mémoires du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Éd. du Muséum, 1994)

Memoirs of the American Entomological Society - American Entomological Society. (American Entomological Society, 1956)

Memoirs of the New York Botanical Garden - New York Botanical Garden (The Garden, 1954)

Memoirs of the New York Botanical Garden - New York Botanical Garden (The Garden, 1958)

Memoirs of the New York Botanical Garden - New York Botanical Garden (The Garden, 1964)

Memoirs of the San Diego Society of Natural History - San Diego Society of Natural History. (The Society, 1972)

Memoria para servir a la carta general de la República Mexicana - García-Cubas, Antonio, 1832 -1912 (Imprenta de Andrade y Escalante, 1861)

Memoria sobre la historia del estudio de la botánica en la Nueva Granada - Vezga, Florentino, 1833 -1890 (Sociedad de Naturalistas Neo-Granadinos, 1860)

Memorias - Academia Nacional de Ciencias Antonio Alzate, Mexico

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1901)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1920)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1897)

Memorie della Società italiana di scienze naturali e del Museo civico di storia naturale di Milano - Museo civico di storia naturale di Milano. (La Società, 2006)

El Mercurio Chileno (1829)

Merveilles de la nature : l'homme et les animaux, description populaire des races humaines et des règne animal - Brehm, Alfred Edmund, 1829 -1884 (J.-B. Baillière et Fils, 1878)

Mexico, Aztec, Spanish and republican : a historical, geographical, political, statistical and social account of that country from the period of the invasion by the Spaniards to the present time : with a view of the ancient Aztec empire and civilization : a historical sketch of the late war : and notices of New Mexico and California - Mayer, Brantz, 1809 -1879 (S. Drake and Company, 1851)

Migrations - New York Botanical Garden (the author, 2013)

Mikrogeologie : das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbständigen Lebens auf der Erde - Ehrenberg, Christian Gottfried, 1795 -1876 (L. Voss, 1854)

Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1974)

Mission scientifique au Mexique et dans l'Amérique Centrale : ouvrage publié par ordre de S.M. l'Empereur et par les soins du Ministre de l'instruction publique - Fournier, Eugène, 1834 -1884 (Imprimerie impériale, 1868)

Mitochondrial DNA sequence, karyotypic, and morphological variation in the Carollia castena species complex (Chiroptera: Phyllostomidae) with description of a new species - Solari, Sergio (Museum of Texas Tech University, 2006)

Mitteilungen aus dem Naturhistorischen Museum in Hamburg - Naturhistorisches Museum in Hamburg. (Lütcke & Wulff, 1908)

Mitteilungen aus dem Naturhistorischen Museum in Hamburg - Naturhistorisches Museum in Hamburg. (Lütcke & Wulff, 1909)

Mitteilungen aus den Botanischen Staatsinstituten in Hamburg - Botanische Staatsinstitut (Hamburg, Germany) (L. Gräfe & Sillem, 1910)

Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie - Bayerische Staatssammlung für Paläontologie und Historische Geologie München (Bayerische Staatssammlung für Paläontologie und Historische Geologie, 1970)

Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Histor. Geologie - Bayerische Staatssammlung für Paläontologie und Historische Geologie München (Bayerische Staatssammlung für Paläontologie und Historische Geologie, 1978)

Mitteilungen der Botanischen Staatssammlung München - Botanische Staatssammlung München. (H. Merxmüller, 1963)

Mitteilungen der Botanischen Staatssammlung München - Botanische Staatssammlung München. (H. Merxmüller, 1987)

Mitteilungen der Botanischen Staatssammlung München - Botanische Staatssammlung München. (H. Merxmüller, 1990)

Mittheilungen des Ornithologischen Vereines in Wien - Ornithologischer Verein in Wien. (1884)

Mittheilungen des Ornithologischen Vereines in Wien - Ornithologischer Verein in Wien. (Der Verein, 1885)

Modern practical farriery : a complete guide to all that relates to the horse; its history, varieties, and uses, breaking, training, feeding, stabling, and grooming, how to buy, keep and treat a horse in health and disease ... forming a complete system of the veterinary art, as a present practised at the Royal Veterinary College, London - Lupton, James Irvine. (William MacKenzie, 1885)

Modern practical farriery : a complete system of the veterinary art as at present practised at the Royal Veterinary College, London - Miles, W. J. (Gresham Pub. Co, 1875)

Molluscorum systema et catalogus. System und aufzählung sämmtlicher conchylien der sammlung vonFr. Paetel. Zur belebung des interesses für malakozoologie nach dessen manuscript hrsg. von dr. L. W. Schaufuss - Schaufuss, L. W. (Ludwig Wilhelm), 1833 -1890 (O. Weiske, 1869)

Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin - Königlich Preussische Akademie der Wissenschaften zu Berlin (Königliche Akademie der Wissenschaften, 1863)

Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin - Königlich Preussische Akademie der Wissenschaften zu Berlin (Königliche Akademie der Wissenschaften, 1878)

Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin - Königlich Preussische Akademie der Wissenschaften zu Berlin (Königliche Akademie der Wissenschaften, 1879)

Monatsschrift des Vereines zur Beförderung des Gartenbaues in den Königl. Preussischen Staaten für Gärtnerei und Pflanzenkunde - Verein zur Beförderung des Gartenbaues in den Königlich Preussischen Staaten. (In Kommission bei Wiegandt, Hempel & Parey [etc.], 1877)

Monografía del Río Hondo, Quintana Roo, E. U. Mexicanos - Herrera, Horacio, (Sociedad Mexicana de Geografía y Estadística, 1946)

A monograph of the birds forming the tanagrine genus Calliste : illustrated by coloured plates of all the known species - Sclater, Philip Lutley, 1829 -1913 (J. Van Voorst, 1857)

A monograph of the Hirundinidae : or family of swallows - Sharpe, Richard Bowdler, 1847 -1909 (Printed for the authors, 1885)