Geologic Map of the Devils Tower 30' x 60' Quadrangle, Crook County, Wyoming, Butte and Lawrence Counties, South Dakota, and Carter County, Montana (2008)

Sutherland, W.M., 2008, Geologic map of the Devils Tower 30' x 60' quadrangle, Crook County, Wyoming, Butte and Lawrence counties, South Dakota, and Carter County, Montana: Wyoming State Geological Survey Map Series 81, scale 1:100,000.