Soil survey of Harper County, KansasAuthor: Ratcliff, Ivan W.
Publisher: Washington] U.S. Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]
Date: 1971. This title can be found in 1 Iowa libraries.
Soil survey, Harper County, OklahomaAuthor: Nance, Earl C.,
Publisher: Washington] U.S. Dept. of Agriculture, Soil Conservation Service,
Date: 1960. This title can be found in 1 Iowa libraries.
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