Endangered and threatened species of Illinois :
status and distribution /
James R. Herkert, editor.
APA Citation
Herkert, J. R., Illinois Endangered Species Protection Board. (19911992). Endangered and threatened species of Illinois: status and distribution. Springfield: Illinois Endangered Species Protection Board.
MLA Citation
Herkert, James R, and Illinois Endangered Species Protection Board. Endangered And Threatened Species of Illinois: Status And Distribution. Springfield: Illinois Endangered Species Protection Board, 19911992.
Warning: These citations may not always be complete (especially for serials).