Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1997)

An illustrated and descriptive catalogue of philosophical, meteorological, mathematical, surveying, optical and photographic instruments, manufactured by L.P. Casella ... London - Casella, L. P. (Louis Pascal), 1812 -1897 (D. Lane, printer, 1860)

An illustrated dictionary of medicine, biology and allied sciences - Gould, George M. (George Milbry), 1848 -1922 (Balliére, Tindall & Cox, 1894)

An illustrated dictionary of medicine, biology and allied sciences - Gould, George M. (George Milbry), 1848 -1922 (P. Blakiston's Son & Co, 1900)

An illustrated dictionary of medicine, biology and allied sciences ... by George M. Gould. 5th ed., with additions and corrections - Gould, George M. (George Milbry), 1848 -1922 (P. Blakiston's Son, 1907)

An illustrated dictionary of scientific terms - Rossiter, William, 1897 (G. P. Putnam's Sons, 1878)

Illustrated natural history of the animal kingdom : being a systematic and popular description of the habits, structure, and classification of animals from the highest to the lowest forms, with their relations to agriculture, commerce, manufactures, and the arts - Goodrich, Samuel G. (Samuel Griswold), 1793 -1860 (Derby & Jackson, 1859)

Illustrated natural history of the animal kingdom, being a systematic and popular description of the habits, structure, and classification of animals from the highest to the lowest forms, with their relations to agriculture, commerce, manufactures, and the arts - Goodrich, Samuel G. (Samuel Griswold), 1793 -1860 (Derby & Jackson, 1865)

Illustrations of British ornithology - Selby, Prideaux John, 1788 -1867 (Printed for the proprietor, and published by W.H. Lizars ; London : Longman, Rees, Orme, Brown, Green and Longman ; Dublin : W. Curry Jun. & Co, 1833)

Illustrations of new species of exotic butterflies : selected chiefly from the collections of W. Wilson Saunders and William C. Hewitson - Hewitson, William C. (William Chapman), 1806 -1878 (John Van Voorst, 1871)

Illustrations of the botany and other branches of the natural history of the Himalayan Mountains :and of the flora of Cashmere - Royle, J. Forbes (John Forbes), 1798 -1858 (Wm. H. Allen, 1839)

Illustrations of zoology. The engravings by F.W. Lowry and Thomas Landseer (John Joseph Griffin and Co, 1851)

Immigrant plants in the Hawaiian islands. II - Fosberg, F. Raymond (Francis Raymond), 1908 -1993 (The University, 1948)

In bird land - Keyser, Leander S. (Leander Sylvester), 1856 -1937 (A. C. McClurg and company, 1897)

In bird land - Keyser, Leander S. (Leander Sylvester), 1856 -1937 (A. C. McClurg and Co, 1896)

In wildest Africa - Whyte, Frederic, 1867 -1941 (Harper, 1907)

Index alphabeticus in J.C. Fabricii Entomologiam systematicam : emendatam et auctam, ordines, genera et species continens - Fabricius, Johann Christian, 1745 -1808 (Apud Proft et Storch, 1796)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1902)

Index animalium; sive, Index nominum quae ab A. D. MDCCLVIII generibus et speeiebus animalium imposita sunt - Sherborn, Charles Davies, 1861 -1942 (e typographio academico, 1801)

Index generum avium : a list of the genera and subgenera of birds - Waterhouse, Frederick Herschel, 1845 -1919 (R.H. Porter, 1889)

Index ornithologicus, sive, Systema ornithologiae : complectens avium divisionem in classes, ordines, genera, species, ipsarumque varietates : adjectis synonymis, locis, descriptionibus, &c - Latham, John, 1740 -1837 (Sumptibus authoris, 1790)

Index to the genera of birds - McGregor, Richard C. (Richard Crittenden), 1871 -1936 (Bureau of Printing, 1920)

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 the stratigraphy of North America - Willis, Bailey, 1857 -1949 (Govt. Print. Off, 1912)

Index zu L. Reichenbach's ornithologischen Werken - Reichenbach, H. G. Ludwig (Heinrich Gottlieb Ludwig), 1793 -1879 (R. Freidlander, 1879)

The indigenous trees of the Hawaiian Islands - Rock, Joseph F. (Joseph Francis), 1884 -1962 (J.F. Rock, 1913)

The indigenous trees of the Hawaiian Islands - Rock, Joseph F. (Joseph Francis), 1884 -1962 (1913)

The influence of Darwin on philosophy, and other essays in contemporary thought - Dewey, John, 1859 -1952 (H. Holt, 1910)

Insecta epizoa : die auf Säugethieren und Vögeln schmarotzenden Insecten nach Chr. L. Nitzsch's Nachlass - Giebel, C. (Christoph), 1820 -1881 (O. Wigand, 1874)

Insecta Saundersiana : or, Characters of undescribed insects in the collection of William Wilson Saunders - Saunders, W. Wilson 1809 -1879 (John Van Voorst, 1852)

Insecutor inscitiae menstruus ([Harrison G. Dyar], 1920)

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, 1917)

An introduction to geology : and its associate sciences mineralogy, fossil botany, and palaeontology - Wright, Thomas, 1809 -1884 (H. G. Bohn, 1855)

An introduction to the natural history of birds : being the article "Ornithology," from the seventh edition of the Encyclopaedia Britannica : with one hundred and thirty-five figures - Wilson, James, 1795 -1856 (Adam and Charles Black, 1839)

An introduction to the natural history of birds; being the article "Ornithology", from the seventh edition of the Encyclopedia Britannica ... - Wilson, James, 1795 -1856 (A. and C. Black, 1839)

An introduction to the ornithology of Cuvier : for the use of students and travellers - Royal College of Physicians of London. (Treuttel & Würtz, 1821)

An introduction to the study of birds; or, The elements of ornithology, on scientific principles. With a particular notice of the birds mentioned in Scripture - Martin, William Charles Linnæus, 1798 -1864 (Religious Tract Society, 1835)

An introduction to the systematic zoology and morphology of vertebrate animals - Macalister, Alexander, 1844 -1919 (Hodges, Foster and Figgis, 1878)

Investigations, chemical and physiological, relative to certain American Vertebrata - Jones, Joseph, 1833 -1896 (Smithsonian Institution, 1856)

Irish gardening (Pub. Office, 1915)

The Irish naturalist - Royal Zoological Society of Ireland. (Eason & Son, Ltd, 1899)

Isis, oder, Encyclopädische Zeitung von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1817)

Isis, oder, Encyclopädische Zeitung von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1819)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1820)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1822)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1823)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1824)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1826)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1827)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1829)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1830)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1831)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1832)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1833)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1834)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1835)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1837)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1839)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1840)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1843)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1844)

Isis von Oken - Oken, Lorenz, 1779 -1851 (Expedition der Isis, 1846)

Jahrbücher des Nassauischen Vereins für Naturkunde - Nassauischer Verein für Naturkunde (J.F. Bergmann, 1909)