An index to the scientific contents of the Journal and Proceedings of the Academy of Natural Sciences of Philadelphia [1817-1910] Published in commemoration of the centenary of the academy, March 21, 1912 - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences, 1912)

Index to volume I, numbers 1 to 17 (Field Columbian Museum, 1900)

Indian Tertiary and post Tertiary Vertebrata - Lydekker, Richard, 1849 -1915 (Geological Survey Office [etc., etc.], 1886)

Indicis generum malacozoorum primordia : nomina subgenerum, generum, familiarum, tribuum, ... / conscripsit A. N. Herrmannsen - Herrmannsen, August Nicolaus, 1807 -1854 (Theodor Fischer, 1846)

Informe oficial de la Comisión científica agregada al Estado Mayor general de la expedicion al Rio Negro (Patagonia) realizada en los meses de Abril, Mayo y Junio de 1879, bajo las órdenes del general d. Julio A. Roca (con 16 láminas) - Berg, Cárlos, 1843 -1902 (Imprenta de Ostwald y Martinez, 1881)

Die infusionsthierchen als vollkommene organismen. Ein blick in das tiefere organische leben der natur - Ehrenberg, Christian Gottfried, 1795 -1876 (L. Voss, 1838)

Die Infusionsthierchen als vollkommene Organismen. Ein Blick in das tiefere organische Leben der Natur - Ehrenberg, Christian Gottfried, 1795 -1876 (L. Voss, 1838)

Inland wetlands of the United States : evaluated as potential registered natural landmarks - Niering, William A. (National Park Service : may be purchased from the Supt. of Docs., Govt. Print. Off, 1975)

The Insect pest survey bulletin - United States. Bureau of Entomology. (Bureau of Entomology, U.S. Dept. of Agriculture, 1931)

Insecten - Altum, Bernard, 1824 -1900 (J. Springer, 1881)

Les insectes : Traité élémentaire d'entomologie, comprenant l'histoire des esèces utiles et de leurs produits des espèces nuisibles et des moyens de les détruire, l'étude des métamorphoses et des moeurs, les procédés de chasses et de conversation - Girard, Maurice, 1822 -1886 (J.-B. Baillière, 1873)

Insects; the yearbook of agriculture,1952 - United States. Department of Agriculture. (U.S.G.P.O, 1952)

Insekten-Börse (1893)

Insekten-Börse (1894)

Insekten-Börse (1895)

Insekten-Börse (1897)

Insetos do Brasil. Tomo 1 - Lima, Angelo Moreira da Costa, 1887 -1964 (Escola Nacional de Agronomia, 1938)

Instruccoes praticas sobre o modo de colligir, preparar e remetter productos zoologicos para o museu de Lisboa - Barbosa du Bocage, J. V. (José Vicente), 1823 -1908 (Imprensa Nacional, 1862)

Intelligence in plants and animals - Gentry, Thomas G. (Thomas George), 1843 -1905 (Doubleday, Page & co, 1900)

Intelligence in plants and animals: being a new edition of the author's privately issued "Soul and immortality." - Gentry, Thomas G. (Thomas George), 1843 -1905 (Doubleday, Page & Co, 1900)

Internal oral features of larvae from eight Anuran families : functional, systematic, evolutionary, and ecological considerations - Wassersug, Richard J. (University of Kansas, 1980)

The internal secretory organs: their physiology and pathology - Biedl, Artur, 1869 -1933 (Bale, 1913)

The internal secretory organs: their physiology and pathology - Biedl, Artur, 1869 -1933 (W. Wood & company, 1913)

International catalogue of scientific literature. N, Zoology - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1901)

International catalogue of scientific literature. M, Botany - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1911)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1903)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1904)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1905)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1907)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1901)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1908)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1909)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1910)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1911)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1912)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1913)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1914)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1915)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1916)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1918)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1919)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1920)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1890)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1891)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1892)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1894)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1896)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1898)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1900)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1901)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1902)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1905)

Internationale Monatsschrift für Anatomie und Physiologie (G. Thieme [et al.,], 1910)

The intestinal protozoa of man - Dobell, Clifford, 1886 -1949 (Wood, 1921)

Introduction aux amphibiens et reptiles du Canada - National Museum of Natural Sciences (Canada) (Musées nationaux du Canada, 1984)

Introduction to Canadian amphibians and reptiles - National Museum of Natural Sciences (Canada) (National Museums of Canada, 1984)

Introduction to cytology - Sharp, Lester W. (Lester Whyland), 1887 - (McGraw-Hill Book Company, inc, 1934)

An introduction to cytology, by Lester W. Sharp ... - Sharp, Lester W. (Lester Whyland), 1887 - (McGraw-Hill book company, inc, 1921)

An introduction to cytology - Sharp, Lester W. (Lester Whyland), 1887 - (McGraw-Hill, 1921)

An introduction to cytology - Sharp, Lester W. (Lester Whyland), 1887 - (McGraw-Hill book company, inc, 1921)

Introduction to evolution - Moody, Paul Amos, 1903 - (Harper, 1962)

An introduction to medical mycology - Hopper, Mary Ellen. (Year Book Publishers, 1948)

An introduction to the comparative anatomy of animals : compiled with constant reference to physiology, and elucidated by twenty copper-plates - Carus, Carl Gustav, 1789 -1869 (Longman, Rees, Orme, Brown, and Green, 1827)