Base source: USGS county base map dated 1975.; "Interpretations derived from soil map constructed 1970 by Cartographic Division, Soil Conservation Service, USDA, of Wells County, North Dakota."; "Projection and 10,000-metre grid ticks, zone 14: Universal Transverse Mercator. 25,000-foot grid ticks based on North Dakota coordinate system, north zone."; "April 1980."; Includes location map and notes., 1 map :color ;66 x 92 cm, Scale 1:100,000, Universal transverse Mercator proj.
United States. Soil Conservation Service (n.d.). Important farmlands, Wells County, North Dakota. United States. Soil Conservation Service. http://cdm17287.contentdm.oclc.org/cdm/ref/collection/maps1/id/33470 (map)