Black duck distribution, harvest characteristics, and survival /
by Aelred D. Geis, Robert I. Smith, and John P. Rogers.

APA Citation

Geis, A. D., Rogers, J. P., Smith, R. I., U.S. Fish and Wildlife Service., United States. Bureau of Sport Fisheries and Wildlife. (1971). Black duck distribution, harvest characteristics, and survival. Washington, D.C.: U.S. Dept. of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife .

MLA Citation

United States. Bureau of Sport Fisheries and Wildlife, et al.. Black Duck Distribution, Harvest Characteristics, And Survival. Washington, D.C.: U.S. Dept. of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife , 1971.