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Memórias do Instituto Butantan - Instituto Butantan (O Instituto, 1978)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1894)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1896)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1897)

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

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, 1902)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1904)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1906)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1907)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1909)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1910)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1914)

Memorias y revista de la Sociedad Científica "Antonio Alzate." - Sociedad Científica "Antonio Alzate." (Imprenta del Gobierno en el Ex-Arzobispado, 1917)

The Mexican and Central American lizards of the genus Sceloporus - Smith, Hobart M. (Hobart Muir), 1912 -2013 (Field Museum of Natural History, 1939)

Mexican resources : a guide to and through Mexico - Ober, Frederick A. (Frederick Albion), 1849 -1913 (Estes and Lauriat, 1884)

Mexicanas plantas nuper a collectoribus expeditionis scientificae allatas :aut longis ab annis in herbario musei parisiensis depositas - Fournier, Eugène, 1834 -1884 (ex Typographeo Reipublicae, 1872)

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)

Mexicos Bregner, en systematisk, critisk, plantegeographisk Undersögelse - Liebmann, F. M. (Frederik Michael), 1813 -1856 (s. n.], 1848)

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Mineral resources of the Kotsina-Chitina region, Alaska - Maddren, Alfred Geddes, (Govt. print. off, 1909)

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Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1970)

Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1971)

Miscellaneous publication - University of Kansas, Museum of Natural History - University of Kansas. Museum of Natural History. (University of Kansas, 1972)

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Mitteilungen aus dem Naturhistorischen Museum in Hamburg - Naturhistorisches Museum in Hamburg. (Lütcke & Wulff, 1884)

Mitteilungen aus dem Naturhistorischen Museum in Hamburg - Naturhistorisches Museum in Hamburg. (Lütcke & Wulff, 1917)

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Mollusks of the tropical eastern Pacific : particularly from the southern half of the Panamic-Pacific faunal province (Panama to Peru) ; Panamic-Pacific Pelecypoda - Olsson, Axel A. (Axel Adolf), 1889 -1976 (Paleontological Research Institution, 1961)

Monatsschrift für Kakteenkunde (J. Neumann, 1908)

Monatsschrift für Kakteenkunde (J. Neumann, 1910)

Monatsschrift für Kakteenkunde (J. Neumann, 1912)

Monografía de los mamíferos de Yucatán - Gaumer, George F, 1851 -1929 (Departamento de talleres gráficos de la Secretaría de fomento, 1917)

A monograph of the genus Chordeiles Swainson : type of a new family of goatsuckers - Oberholser, Harry C. (Harry Church), 1870 -1963 (G.P.O, 1914)

A monograph of the genus Chordeiles Swainson, type of a new family of goatsuckers - Smithsonian Institution (Govt. print. off, 1914)

Monographia heliceorum viventium : sistens descriptiones systematicas et criticas omnium huius familiae generum et specierum hodie cognitarum - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Brockhaus, 1877)

Monographia heliceorum viventium : sistens descriptiones systematicas et criticas omnium hujus familiae generum et specierum hodie cognitarum / auctore Ludovico Pfeiffer - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (1877)

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Mycologia - New York Botanical Garden (New York Botanical Garden, 1910)

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Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1896)

Narrative of a voyage round the world : performed in Her Majesty's ship Sulphur, during the years 1836-1842, including details of the naval operations in China, from Dec. 1840, to Nov. 1841 ; published under the authority of the lords commissioners of the Admiralty - Belcher, Edward, Sir, 1799 -1877 (Henry Colburn, 1843)

Narrative of a voyage to the Pacific and Beering's Strait, to co-operate with the polar expeditions : performed in His Majesty's ship Blossom, under the command of Captain F.W. Beechey in the years 1825, 26, 27, 28 - Beechey, F. W. (Frederick William), 1796 -1856 (Henry Colburn and Richard Bentley, 1831)

Narrative of the circumnavigation of the globe by the Austrian frigate Novara, (Commodore B. von Wullerstorf-Urbair,) : undertaken by order of the imperial government, in the years l857,1858, & 1859, under the immediate auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-in-Chief of the Austrian Navy - Humboldt, Alexander von, 1769 -1859 (Saunders, Otley, 1861)

Narrative of a voyage to the Pacific and Beering's strait, to co-operate with the polar expeditions: performed in His Majesty's ship Blossom, under the command of Captain F.W. Beechey ... in the years 1825, 26, 27, 28 - Beechey, F. W. (Frederick William), 1796 -1856 (H. Colburn and R. Bentley, 1831)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1903)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1904)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1906)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1910)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1911)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1913)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1914)

The National geographic magazine - National Geographic Society (U.S.) (National Geographic Society, 1917)

Natural history - American Museum of Natural History (1923)

Natural history - American Museum of Natural History (American Museum of Natural History, 1923)

Natural history - American Museum of Natural History (American Museum of Natural History, 1981)

Natural history - American Museum of Natural History (American Museum of Natural History, 1994)