Vol. 32 No. 1-4 (1981)

					View Vol. 32 No. 1-4 (1981)
Article 1 - Waterfowl Populations and the Changing Environment of the Illinois River Valley. Frank Chapman Bellrose, Fred L. Paveglio, and Donald W. Steffeck
Article 2 - Primary Insect Types in the Illinois Natural History Survey Collection, Exclusive of the Collembola and Thysanoptera. Donald W. Webb
Article 3 - The Genera of Nearctic Therevidae. Michael E. Irwin and Leif L. Lyneborg
Article 4 - The Lake Sangchris Study Case History of an Illinois Cooling Lake. R. Weldon Larimore and John A. Tranquilli
Published: 1981-08-31