United States. Bureau of Chemistry and Soils. http://id.loc.gov/authorities/names/n80145307
Title:
Soil map, Hancock County, Iowa / U.S. Dept. of Agriculture, Bureau of Chemistry and Soils ; Iowa Agricultural Experiment Station ; soils surveyed by F.R. Lesh ... T.H. Benton, and G.B. Killinger.
Publisher:
U.S. Department of AgricultureBureau of Chemistry and Soils,
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.