Soil survey, Salcha-Big Delta Area Alaska

by Schoephorster, Dale B.
Washington] U.S. Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1973

Soil survey [of] Susitna Valley area, Alaska

by Schoephorster, Dale B., Hinton, Robert B.
[Washington] United States Dept. of Agriculture, Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1973

Exploratory soil survey of Alaska /

by Rieger, Samuel, 1921-, Schoephorster, Dale B., Furbush, Clarence E.
[Washington] : U.S. Dept. of Agriculture, Soil Conservation Service, 1979

Soil survey of Totchaket area, Alaska.

[Washington, D.C.?] : U.S. Dept. of Agriculture, Soil Conservation Service, 1980