1. Charles M. Russell National Wildlife Refuge, U.S. Fish and Wildlife Service, Lewistown, Montana.
2. Fort Collins Science Center, U.S. Geological Survey, Fort Collins, Colorado.
3. Bureau of Land Management, Malta, Montana.
4. Bacteriology Division, U.S. Army Medical Research Institute of Infectious Diseases, Frederick, Maryland.
5. National Wildlife Health Center, U.S. Geological Survey, Madison, Wisconsin.