Incoming Resources
- U.S. Dept. of the Interior, National Park Service, Washington, D.C.?, 1991
- U.S. Dept. of Agriculture, Soil Conservation Service, in cooperation with Illinois Agricultural Experiment Station, Washington, D.C.?, 1964
- The Service, Washington, D.C.?, 1985
- The Society, Distributed by B.H. Mills, Washington, D.C.?, Albany, N.Y., 1963
- Illinois Dept. of Conservation, U.S. Fish and Wildlife Service, Springfield, Ill.?, Washington, D.C.?, 1981
- PBS DVD, Distributed by Warner Home Video, Washington, D.C.?, Burbank, CA, ©2000
- The Service, Washington, D.C.?, 1991
- The Author, Washington, D.C.?, 1935