Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1924)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1942)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1943)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1944)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1949)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1950)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1951)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1953)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1954)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1955)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1956)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1957)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1959)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1960)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1962)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1963)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1966)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1979)

Illinois biological monographs - University of Illinois at Urbana-Champaign. (Univ. of Illinois Press, 1914)

Illinois birds, Wood warblers - Graber, Jean W. (Jean Weber), 1924 -2015 (State of Illinois, Dept. of Registration and Education, Natural History Survey Division, 1983)

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L.U. Gill, 1884)

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

Illustrated natural history - Wood, J. G. (John George), 1827 -1889 (Home Bk. Co, 1880)

An illustrated synopsis of the principal larval forms of the order Coleoptera - Böving, Adam Giede, 1869 -1957 (The Brooklyn Entomological Society, 1931)

Illustrations of exotic entomology : containing upwards of six hundred and fifty figures and descriptions of foreign insects, interspersed with remarks and reflections on their nature and properties - Westwood, J. O. (John Obadiah), 1805 -1893 (Henry G. Bohn, 1837)

Illustrierte Wochenschrift für Entomologie - Berliner Entomologische Gesellschaft. (J. Neumann, 1897)

Illustrierte Zeitschrift für Entomologie - Allgemeine Entomologische Gesellschaft. (J. Neumann, 1898)

Illustrierte Zeitschrift für Entomologie - Allgemeine Entomologische Gesellschaft. (J. Neumann, 1899)

Illustrierte Zeitschrift für Entomologie - Allgemeine Entomologische Gesellschaft. (J. Neumann, 1900)

Implications of the use of non-native trees for reforestation on public lands in Alberta : a scientific review - Alberta. Alberta Environment. (Alberta Sustainable Resource Development, 2001)

Improving productivity on forests and rangelands : 1980 research accomplishments - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, 1981)

Index Coleopterorum in Museo Historico-Naturali Serbico - Košanin, Nedeljko, 1874 -1934 (Narodni muzej–Beograd, 1904)

Index palaeontologicus : oder Übersicht der bis jetzt bekannten fossilen Organismen - Bronn, H. G. (Heinrich Georg), 1800 -1862 (E. Schweitzerbart, 1848)

Index to information on insects associated with western wildland shrubs - Nelson, David L. (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1988)

Index to the known fossil insects of the world : including myriopods and arachnids - Geological Survey (U.S.) (Department of the Interior, Geological Survey, 1891)

Indian forest insects of economic importance. Coleoptera - Stebbing, Edward Percy, 1870 -1960 (Eyre & Spottiswoode, 1914)