Geologic Map of the Gillette 30' x 60' Quadrangle, Campbell, Crook, and Weston Counties, Wyoming (1998)

Boyd, C.S., and Ver Ploeg, A.J., 1998, Geologic map of the Gillette 30' x 60' quadrangle, Campbell, Crook, and Weston counties, Wyoming: Wyoming State Geological Survey Map Series 49, scale 1:100,000.