London Naturalist - London Natural History Society. (London Natural History Society, 1955)

London Naturalist - London Natural History Society. (London Natural History Society, 1973)

London Naturalist - London Natural History Society. (London Natural History Society, 1982)

London Naturalist - London Natural History Society. (London Natural History Society, 2004)

Long Island Botanical Society newsletter - Long Island Botanical Society. (Long Island Botanical Society, 1999)

Madroño; a West American journal of botany - California Botanical Society. (California Botanical Society, 2006)

Magazin der Entomologie - Ahrens, August, 1779 -1841 (Joh. Chr. Hendel, 1821)

Die Malaria, Studien eines Zoologen - Grassi, Battista, 1854 -1925 (Fischer, 1901)

A manual for the study of insects - Comstock, John Henry, 1849 -1931 (Comstock publishing company, inc, 1938)

A manual for the study of insects - Comstock, John Henry, 1849 -1931 (Comstock Pub. Co, 1930)

Manual of elementary zoology - Borradaile, L. A. (Lancelot Alexander), 1872 -1945 (Oxford University Press, 1958)

Manual of entomology : with special reference to economic entomology - Maxwell-Lefroy, H. (Harold), 1877 -1925 (Longmans, Green & Co, 1923)

Manual of North American Diptera - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (J. T. Hathaway, 1908)

Manual of North American Diptera - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (J.T. Hathaway, 1908)

Manual of the families and genera of North American Diptera - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (J.T. Hathaway, 1896)

Manual of the families and genera of North American diptera - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (Hathaway, 1896)

Manual of the families and genera of the North American Diptera - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (J.T. Hathaway, 1896)

A manual on guidelines for the control of arboviral encephalitides in Canada - Canada Biting Fly Centre. (Research Branch, Agriculture Canada, 1990)

Marquesan insects (The Museum, 1935)

Maryland entomologist - Maryland Entomological Society. (Maryland Entomological Society, 2009)

Maryland naturalist - Natural History Society of Maryland (The Society, 1987)

Mazedonien : erlebnisse und beobachtungen eines naturforschers im gefolge des deutschen heeres - Doflein, Franz, 1873 -1924 (Gustav Fischer, 1921)

Meddelanden af Societas pro Fauna et Flora Fennica - Societas pro Fauna et Flora Fennica ([Societas pro Fauna et Flora Fennica], 1920)

Mémoires couronnés et autres mémoires publiés par l'Académie royale des sciences, des lettres et des beaux-arts de Belgique - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (F. Hayez, 1859)

Mémoires couronnés et autres mémoires publiés par l'Académie royale des sciences, des lettres et des beaux-arts de Belgique - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (F. Hayez, 1895)

Mémoires couronnés et mémoires des savants étrangers / publiés par l'Académie royale des sciences, des lettres et des beaux-arts de Belgique - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (1840)

Mémoires couronnés et mémoires des savants étrangers / publiés par l'Académie royale des sciences, des lettres et des beaux-arts de Belgique - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (1847)

Mémoires de l'Académie Impériale des Sciences, Littérature et Beaux-Arts de Turin : Littérature et Beaux-Arts - Reale accademia delle scienze di Torino (Imprimerie de l'Académie Impériale des Sciences, 1805)

Mémoires du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Editions du Muséum, 1938)

Mémoires du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Editions du Museum, 1950)

Mémoires du Muséum national d'histoire naturelle. Série A, Zoologie - Muséum national d'histoire naturelle (France) (Éd. du Muséum, 1968)

Mémoires du Muséum national d'histoire naturelle. Série A, Zoologie - Muséum national d'histoire naturelle (France) (Éd. du Muséum, 1978)

Mémoires du Muséum national d'histoire naturelle. Série A, Zoologie - Muséum national d'histoire naturelle (France) (Éd. du Muséum, 1990)

Memoirs of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (The Academy, 1860)

Memoirs of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (The Academy, 1868)

Memoirs of the Carnegie Museum - Carnegie Institute. Board of Trustees. (Published by the authority of the Board of Trustees of the Carnegie Institute, 1935)

Memoirs of the Queensland Museum - Queensland Museum. (Queensland Museum, 1985)

Memoirs of the Queensland Museum - Queensland Museum. (Queensland Museum, 1994)

Memoirs of the Queensland Museum - Queensland Museum. (Queensland Museum, 1999)

Memoirs of the Queensland Museum - Queensland Museum. (Queensland Museum, 2000)

Memoirs of the Queensland Museum - Queensland Museum. (Queensland Museum, 2007)

Memorial of life and entomologic work of Joseph Albert Lintner ... state entomologist, 1874-98 - Felt, Ephraim Porter, 1868 -1943 (University of the State of New York, 1899)

Memorial of life and entomologic work of Joseph Albert Lintner, state entomologist, 1874-98 - Felt, Ephraim Porter, 1868 -1943 (University of the State of New York, 1899)

Memorias - Academia Nacional de Ciencias Antonio Alzate, Mexico

Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1930)

Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1935)

Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1939)

Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1972)

Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1974)

Memórias do Instituto de Butantan - Instituto Butantan (Instituto Soroterápico "Butantan", 1918)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1840)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1873)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1876)

Mesembryanthemum and some new genera separated from it - Brown, Nicholas Edward, 1849 -1934 (s.n.], 1921)

Meyers grosses konversations-lexikon. Ein nachschlagewerk des allgemeinen wissens. 2557142MC - Meyer, Hermann Julius, 1826 -1909 (Bibliographisches Institut, 1902)

Meyers Konversations-Lexikon : eine Encyklopädie des allgemeinen Wissens - Meyer, Hermann Julius, 1826 -1909 (1885)

Meyers Konversations-Lexikon : eine Encyklopädie des allgemeinen Wissens - Meyer, Hermann Julius, 1826 -1909 (Verlag des Bibliographischen Instituts, 1890)

Michigan botanist - Michigan Botanical Club. (Michigan Botanical Club, 1968)

Microanatomical study on the eyes of the lone star tick and the screwworm fly with related electrophysiological studies - Phillis, William Avery, 1942 - (1975)

Microbes and you - Wedberg, Stanley E. (Macmillan, 1954)

Microbiology for agricultural and domestic science students - Marshall, Charles E. (Charles Edward), 1866 -1927 (Blakiston, 1917)

Microbiology, a text-book of microörganisms, general and applied - Marshall, Charles E. (Charles Edward), 1866 -1927 (P. Blakiston's Son & Co, 1921)

Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1955)

Mitteilungen der Münchner Entomologischen Gesellschaft - Münchner Entomologische Gesellschaft. (Münchner Entomologische Gesellschaft, 1965)

Mitteilungen der Münchner Entomologischen Gesellschaft - Münchner Entomologische Gesellschaft. (Münchner Entomologische Gesellschaft, 1973)

Mitteilungen der Schweizerischen Entomologischen Gesellschaft = Bulletin de la Société entomologique suisse - Schweizerische Naturforschende Gesellschaft. (Schweizerische Entomologische Gesellschaft, 1900)

Modern biology - Moon, Truman Jesse, 1879 -1946 (H. Holt and company, 1947)

Modern biology - Moon, Truman Jesse, 1879 -1946 (Holt, Rinehart and Winston, 1965)

Modern science problems; a textbook in general science - Heiss, Elwood D. 1899 - (Webster Pub. Co, 1936)

Monitore zoologico italiano - Unione zoologica italiana. (Instituto anatomico della R. Università di Siena, 1890)

Monogenetic trematodes : their systematics and phylogeny - Bykhovskiĭ, B. E. (Boris Evseevich), 1908 -1974 (American Institute of Biological Sciences, 1961)

A monograph of the Culicidae, or mosquitoes. Mainly compiled from the collections received at the British museum from various parts of the world in connection with the investigation into the cause of malaria conducted by the Colonial office and the Royal society - British Museum (Natural History). Department of Zoology. (Printed by order of the Trustees, 1901)