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, 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, 1912)

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)

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, 1858)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1864)

Memorie della Reale accademia delle scienze di Torino - Accademia delle scienze di Torino (Stamperia reale, 1911)

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, 1992)

El Mercurio Chileno (1828)

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 og Centralamerikas Acanthaceer - Ørsted. Anders Sandøe, 1778 -1860 (B. Lunos Bogtryk, 1855)

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, 1983)

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Microscopic objects, animal, vegetable and mineral; with instructions for preparing and viewing them - Pritchard, Andrew, 1804 -1882 (Whittaker, 1847)

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

Minnesota botanical studies - Geological; Natural History Survey of Minnesota. (Geological and Natural History Survey of Minnesota, 1894)

Minor products of Philippine forests - Brown, William Henry, 1884 -1939 (Bureau of Printing, 1920)

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

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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)

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A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum - British Museum (Natural History). Department of Botany. (Printed by Order of the Trustees, 1894)

A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum - British Museum (Natural History). Department of Botany. (Printed by Order of the Trustees, 1911)

A monograph of the British lichens; a descriptive catalogue of the species in the Department of Botany, British Museum - British Museum (Natural History). Department of Botany. (Trustees of the British Museum, 1918)

A monograph of the genus Dryopteris - Christensen, Carl, 1872 -1942 (B. Lunos bogtr, 1912)

Monographia Aquifoliacearum Pt. I - Loesener, Th. (Theodor), 1865 -1941 (1901)

Monographiae phanerogamarum : prodromi, nunc continuatio, nunc revisio - Candolle, Alphonse de, 1806 -1893 (G. Masson, 1896)

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Monographiæ phanerogamarum : Prodromi nunc continuatio, nunc revisio - Candolle, Alphonse de, 1806 -1893 (vol.1-8, G. Masson ; vol.9, Masson & Cie, 1879)

Monographiæ phanerogamarum : Prodromi nunc continuatio, nunc revisio - Candolle, Alphonse de, 1806 -1893 (vol.1-8, G. Masson ; vol.9, Masson & Cie, 1891)

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Monophyly and geography of the RiМЃo PaМЃnuco Basin swordtails (genus Xiphophorus) with descriptions of four new species - Kallman, Klaus D. (American Museum of Natural History, 1990)

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Morphology and taxonomy of fungi - Bessey, Ernst Athearn, 1877 -1957 (Blakiston, 1950)

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Moss flora of Central America - Crum, Howard, 1922 -2002 (Missouri Botanical Garden, 2010)

The moth book; a popular guide to a knowledge of the moths of North America - Holland, W. J. (William Jacob), 1848 -1932 (Doubleday, Page & company, 1903)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1977)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1992)

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

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2013)

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

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

Muhlenbergia - Heller, Amos Arthur, 1867 -1944 (1911)

Museum botanicum Lugduno-Batavum, sive, Stirpium exoticarum novarum vel minus cognitarum ex vivis aut siccis brevis expositio et descriptio - Blume, C. L. (Carl Ludwig), 1796 -1862 (E.J. Brill, 1849)

Muséum-Demidoff (mis en ordre systématique et décrit par G. Fischer) : Ou catalogue ... des curiosités de la Nature et de l'Art. données à l'Université impériale de Moscou par ... P. de Demidoff - Fischer von Waldheim, Gotthelf, 1771 -1853 (1807)

Museum Leskeanum : regnum animale quod ordine systematico - Leske, Nathanael Gottfried, 1751 -1786 (Sumptibus haeredum I.G. Mülleri, 1789)

Museum N.G. Leskeanum. Pars entomologica ; ad systema entomologiae Cl. Fabricii ordinata - Leske, Nathanael Gottfried, 1751 -1786 (In Bibliopolio I.G. Mülleriano, 1788)

The museum of natural history; being a popular account of the structure, habits, and classification of the various departments of the animal kingdom: quadrupeds, birds, reptiles, fishes, shells, and insects, including the insects destructive to agriculture - Holder, Joseph B. (Joseph Bassett), 1824 -1888 (J. S. Virtue, 1877)

Mycologia - New York Botanical Garden (New York Botanical Garden, 1911)

Mycologia - New York Botanical Garden (New York Botanical Garden, 1913)

Myriapodologica - Virginia Museum of Natural History (Martinsville) (Virginia Museum of Natural History, 1997)

Myriapodologica - Virginia Museum of Natural History (Martinsville) (Virginia Museum of Natural History, 1998)

Narrative of a voyage to the Pacific and Beering's Strait, to co-operate with the polar expeditions - Beechey, F. W. (Frederick William), 1796 -1856 (Carey & Lea, 1832)

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 surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe - Darwin, Charles, 1809 -1882 (Henry Colburn, 1839)

Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle between the years 1826 and 1836 : describing their examination of the southern shores of South America and the Beagle's circumnavigation of the globe : in three volumes - Darwin, Charles, 1809 -1882 (Henry Colburn, 1839)

Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe - Darwin, Charles, 1809 -1882 (H. Colburn, 1839)

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, 1906)

Die Natur - Müller, Karl, 1818 -1899 (G. Schwetschke, 1852)

Natural history - American Museum of Natural History (American Museum of Natural History, 1919)

The natural history of British insects; explaining them in their several states, with the periods of their transformations, their food, oeconomy, &c. together with the history of such minute insects as require investigation by the microscope. The whole illustrated by coloured figures, designed and executed from living specimens - Donovan, E. (Edward), 1768 -1837 (Printed for the author, and for F. & C. Rivington, 1792)

The natural history of Dee Side and Braemar - Lankester, Edwin, 1814 -1874 (Printed for private circulation [by Bradbury and Evans], 1855)

A natural history of the animal kingdom being a systematic and popular description of the habits, structure, and classification of animals, from the lowest to the highest forms. Arranged according to their organisation - Gray, John Edward, 1800 -1875 (Charles Griffin and company, 1860)

Natural history of the insects of China, containing upwards of two hundred and twenty figures anddescriptions - Donovan, E. (Edward), 1768 -1837 (H.G. Bohn, 1842)

Natural history of the insects of China, containing upwards of two hundred and twenty figures and descriptions - Donovan, E. (Edward), 1768 -1837 (H.G. Bohn, 1842)

Natural history of the insects of China : the figures drawn from specimens of the insects - Donovan, E. (Edward), 1768 -1837 (Published by Rob Havell, 77, Oxford Street, and H.G. Bohnt York Street, Covent Garden, 1838)

Natural theology: comprising A discourse of natural theology, Dialogues on instinct, and Dissertations on the structure of the cells of bees and on fossil osteology - Brougham; Vaux, Henry Brougham, Baron, 1778 -1868 (R. Griffin, 1856)

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, 1871)

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)

Naturaleza y civilización de la grandiosa isla de Cuba, ó, Estudios variados y científicos, al alcance de todos, y otros históricos, estadísticos y políticos - Rodríguez-Ferrer, Miguel, 1815 -1889 (Imprenta de J. Noguera á cargo de M. Martinez, 1876)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1890)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1949)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1968)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1972)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1978)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1984)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1989)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1994)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1999)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 2001)