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Mittheilungen des Münchener Entomologischen Vereins - Münchener Entomologischer Verein. (T. Ackermann, 1879)

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Mittheilungen über neue und kritische Formen der Bündner- und Nachbar-Floren - Brügger, Chr. Gr. (Christian Gregor), 1833 -1899 (Brügger, 1886)

Mittheilungen von Forschungsreisenden und Gelehrten aus den deutschen Schutzgebieten : mit Benutzung amtlicher quellen (U. Usher, 1896)

Miyabe-festschrift, or A collection of botanical papers presented to Prof. Dr. Kingo Miyabe on the occasion of the twenty-fifth anniversary of his academic service by his friends and pupils - Miyabe, Kingo, 1860 -1951 (Rokumeikwan, 1911)

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Le Monde des plantes - Académie internationale de géographie botanique. (Impr. Edmond Monnoyer, 1893)

Le Monde des plantes - Académie internationale de géographie botanique. (Impr. Edmond Monnoyer, 1894)

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Mongolia, the Tangut country, and the solitudes of northern Tibet, being a narrative of three years' travel in eastern high Asia - Przhevalʹskiĭ, Nikolaĭ Mikhaĭlovich, 1839 -1888 (S. Low, Marston, Searle, & Rivington, 1876)

Monograph & iconograph of native British Orchidace - Godfery, Hilda Margaret. (University press, 1933)

Monograph of the British aphides ... - Buckton, George Bowdler, 1817 -1905 (Printed for the Ray Society, 1879)

A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture - Plowright, Charles B. (Charles Bagge), 1849 -1910 (K. Paul, Trench, 1889)

A monograph of the Erysiphaceae - Salmon, Ernest Stanley. (Torrey Botanical Club], 1900)

Monograph of the land & freshwater Mollusca of the British isles - Roebuck, William Denison, 1851 -1919 (Taylor brothers, 1914)

A monograph of the Najades of Pennsylvania - Ortmann, Arnold E. 1863 -1927 (Published by the authority of the Board of Trustees of the Carnegie Institute, 1911)

Monograph of the voles and lemmings (Microtinae) living and extinct - Hinton, Martin A. C. (Martin Alister Campbell), 1883 -1961 (1826)

Monographia uredinearum : seu specierum omnium ad hunc usque diem cognitarum descriptio et adumbratio systematica - Sydow, P. (Paul), 1851 -1925 (Fratres Borntraeger, 1904)

Monographie der Familien der Pflanzenläuse (Phytophthires) - Kaltenbach, J. H. (Johann Heinrich), 1807 -1876 (In Commission der Roschütz'schen Buchandlung, 1843)

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Monographie des Pilosella et des Hieracium du Dauphine, suivie de l'analyse de quelques autres Plantes - Arvet-Touvet, Casimir, 1841 -1913 (Grenoble, 1873)

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Morphologische und physiologische Analyse der Zelle der Pflanzen und Tiere : Grundzüge unseres Wissens über den Bau der Zelle und über dessen Beziehung zur Leistung der Zelle - Meyer, Arthur, 1850 -1922 (G. Fischer, 1920)

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Mostly new and rare rockery plants : some never before listed in America : all hardy in Michigan [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank W. Campbell, 1931)

Moths - Bell, Thomas Reid Davys, 1863 -1948 (Taylor and Francis; [etc., etc.], 1937)

The moths of the British Isles - South, Richard, 1846 -1932 (F. Warne, 1900)

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The mountain - Jackson, Robert Montgomery Smith, 1815 -1865 (J. B. Lippincott & Co, 1860)

Mountain wild flowers of America; a simple and popular guide to the names and descriptions of the flowers that bloom above the clouds - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (Ginn, 1906)

Mountain wild flowers of Canada : a simple and popular guide to the names and descriptions of the flowers that bloom above the clouds - Henshaw, Julia W. (Julia Wilmotte) 1869 -1937 (William Briggs, 1906)

The Mountaineer (The Mountaineers, 1907)

The Mountaineer (The Mountaineers, 1910)

The mountains of California - Muir, John, 1838 -1914 (Houghton Mifflin Company, 1916)

The mountains of California - Muir, John, 1838 -1914 (The Century Co, 1898)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1969)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1979)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1981)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1998)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2000)

Muhlenbergia - Heller, Amos Arthur, 1867 -1944 (1905)

Muhlenbergia - Heller, Amos Arthur, 1867 -1944 (1907)

Muhlenbergia - Heller, Amos Arthur, 1867 -1944 (1909)

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The mutation theory; experiments and observations on the origin of species in the vegetable kingdom - Vries, Hugo de, 1848 -1935 (Open Court Publishing Company; [etc., etc.], 1909)