South Dakota Soil Surveys and Maps
To request surveys or to find web soil surveys contact the South
Dakota state office of the Natural Resources Conservation Service (NRCS).
SU: A 57.38:G 86/2
CA: United States. Soil Conservation Service.
United States. Bureau of Indian Affairs.
South Dakota Agricultural Experiment Station.
TI: Soil survey of Gregory County, South Dakota.
SO: [Washington, D.C.?] : The Service, 1984.
PD: ix, 175 p.,  folded p. of plates : ill., maps (1 col.) ; 28 cm