Soil survey of Crawford County, Iowa.

by Kovar, John A., Dideriksen, Raymond Ivan, 1925-, Fisher, Charles S.
Washington] U.S. Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1973

Soil survey of Adair County, Iowa /

by Sherwood, Max A.
[Washington] : The Service, 1980

Soil survey, Guthrie County, Iowa

by Russell, Robert Cone, 1917-, Dideriksen, Raymond Ivan, 1925-, Fisher, Charles S.
Washington] U.S. Soil Conservation Service in cooperation with the Iowa Agriculture and Home Economics Experiment Station; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1974

Soil survey of Lyon County, Iowa /

by Dankert, Wayne N., Hanson, Laurence T.
[Washington] : U.S. Dept. of Agriculture, Soil Conservation Service, 1978

Soil survey of Fremont County, Iowa /

by Clark, Lewis A., Nixon, John R.
Washington : U.S. Dept. of Agriculture, Soil Conservation Service, 1975

Soil survey of Clinton County, Iowa.

by Boeckman, Louis E.
[Washington, D.C.] : U.S. Dept. of Agriculture, Soil Conservation Service, 1981

Soil survey of Wapello County, Iowa.

by Seaholm, James E.
[Washington, D.C.?] : U.S. Dept. of Agriculture, Soil Conservation Service, 1981

Soil survey of Calhoun County, Iowa.

by Koppen, Maynard P.
[Washington, D.C.?] : U.S. Dept. of Agriculture, Soil Conservation Service, 1981

Soil survey of Poweshiek County, Iowa /

by Nestrud, Lorne M., 1916-
[Washington, D.C.?] : U.S. Dept. of Agriculture, Soil Conservation Service, 1981

Soil survey of Cerro Gordo County, Iowa /

by De Witt, Thomas A.
[Washington, D.C.?] : The Service, 1981