Wild Trout IV :
proceedings of the Symposium, Yellowstone National Park, September 18-19, 1989 /
technical editors: Frank Richardson, R.H. Hamre ; sponsors: U.S. Department of the Interior ... [et al.].
APA Citation
Wild Trout Symposium (4th : 1989 : Yellowstone National Park)., Hamre, R. H., Richardson, F., United States. Dept. of the Interior., United States. Forest Service. (1990). Wild Trout IV: proceedings of the Symposium, Yellowstone National Park, September 18-19, 1989. [Washington, D.C.?: U.S. Dept. of Agriculture, Forest Service.
MLA Citation
United States. Forest Service, et al.. Wild Trout IV: Proceedings of the Symposium, Yellowstone National Park, September 18-19, 1989. [Washington, D.C.?: U.S. Dept. of Agriculture, Forest Service, 1990.
Warning: These citations may not always be complete (especially for serials).