Preliminary Digital Geologic Map of the Sheridan 30' x 60' Quadrangle, Sheridan, Johnson and Campbell Counties, Wyoming, and Southeastern Montana (2001)

Ver Ploeg, A.J., and Boyd, C.S., 2001, Preliminary digital geologic map of the Sheridan 30' x 60' quadrangle, Sheridan, Johnson and Campbell counties, Wyoming, and southeastern Montana: Wyoming State Geological Survey Hazards Section Digital Map 01-1, 5 p., scale 1:100,000.