"Interpretations derived from soil survey sheets completed 1979 by Soil Conservation Service, USDA, of Valley County, Montana."; "August 1982 BASE 4-R-37900."; Source: Base map prepared by SCS, WTSC Carto Unit from 1:126,720 General highway maps.; Includes location map. 156 x 126 centimeters; 94 x 122 centimeters; 89 x 127 centimeters Scale 1:100,000