Urbana :State of Illinois, Dept. of Registration and Education, Natural History Survey Division,1978. | University Library, University of Illinois Urbana Champ

Urbana, Ill. :State of Illinois, Illinois Institute of Natural Resources, Natural History Survey Division, Illinois Natural History Survey,[1979] | University

Champaign, Ill. :State of Illinois, Dept. of Energy and Natural Resources, Natural History Survey Division,[1984]. | University Library, Uni

Urbana: State of Illinois, Department of Registration and Education, Natural History Survey Division, 1976.