Aerial census of Canada geese and waterfowl :
1 July 1985-30 June 1986 /
by Stephen P. Havera.
APA Citation
Havera, S. P., Illinois. Department of Conservation., Illinois. Section of Wildlife Research. (91986). Aerial census of Canada geese and waterfowl: 1 July 1985-30 June 1986. [Champaign, Ill.]: Illinois Natural History Survey.
MLA Citation
Havera, Stephen P, Illinois. Department of Conservation, and Illinois. Section of Wildlife Research. Aerial Census of Canada Geese And Waterfowl: 1 July 1985-30 June 1986. [Champaign, Ill.]: Illinois Natural History Survey, 91986.
Warning: These citations may not always be complete (especially for serials).