Memoirs of the California Academy of Sciences - California Academy of Sciences (The Academy, 1974)

Memoirs of the California Academy of Sciences - California Academy of Sciences (The Academy, 1988)

Memoirs of the Museum of Comparative Zoölogy, at Harvard College, Cambridge, Mass - Harvard University. Museum of Comparative Zoology. (The Museum, 1884)

Memoirs of the National Academy of Sciences - National Academy of Sciences (U.S.) (Government Printing Office, 1914)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1899)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1846)

Minutes - Conchological Club of Southern California. (The Club, 1947)

Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1967)

Mitteilungen der Kaiserlich-Königlichen Geographischen Gesellschaft - Kaiserlich-Königliche Geographische Gesellschaft. (1858)

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

Monatsschrift für Kakteenkunde (J. Neumann, 1906)

Monatsschrift für Kakteenkunde (J. Neumann, 1910)

Monograph of the native trouts of the genus Salmo of western North America - U.S. Fish; Wildlife Service (U.S. Dept. of Agriculture, Forest Service, 1979)

Monograph of the native trouts of the genus Salmo of western North America - U.S. Fish; Wildlife Service (Forest Service, U.S. Dept. of Agriculture, 1979)

Monographs of the United States Geological Survey - Geological Survey (U.S.) (Govt. Print. Off, 1882)

Muhlenbergia - Heller, Amos Arthur, 1867 -1944 (1900)

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

Name that animal; a guide to the identification of the common land and fresh-water animals of the United States, with special reference to the area east of the Rockies - Driver, Ernest Charles, 1899 - (1950)

Natural history - Lydekker, Richard, 1849 -1915 (Hutchinson, 1897)

Natural science (Macmillan & Co, 1897)

La naturaleza; periódico científico del Museo Nacional de Historia Natural y de la Sociedad Mexicana de Historia Natural - Sociedad Mexicana de Historia Natural. (Impr. de I. Escalante, 1885)

La naturaleza; periódico científico del Museo Nacional de Historia Natural y de la Sociedad Mexicana de Historia Natural - Sociedad Mexicana de Historia Natural. (Impr. de I. Escalante, 1887)

Le Naturaliste : journal des échanges et des nouvelles - Deyrolle, Émile, 1838 -1917 (Bureaux à Paris, 1885)

Nature - Lockyer, Norman, Sir, 1836 -1920 (Macmillan Journals Ltd., etc, 1908)

The Nautilus - American Malacologists, Inc. (American Malacologists, inc., etc, 1907)

Nests and eggs of North American birds - Davie, Oliver, 1857 -1911 (D. McKay, 1900)

Nests and eggs of North American birds - Davie, Oliver, 1857 -1911 (Landon Press, 1898)

Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde - Bronn, H. G. (Heinrich Georg), 1800 -1862 (E. Schweizerbart's Verlagshandlung, 1856)

Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde - Bronn, H. G. (Heinrich Georg), 1800 -1862 (E. Schweizerbart's Verlagshandlung, 1860)

The New Mexico botanist - New Mexico State University. Cooperative Extension Service. (Range Science Herbarium and Cooperative Extension Service, 2010)