Geologic map of the Gillette 30' x 60' quadrangle, Campbell, Crook, and Weston Counties, northeastern Wyoming
Cynthia S Boyd; Alan J Ver Ploeg; Fred H Porter; Wyoming State Geological Survey
Laramie, Wyo. Wyoming State Geological Survey 1998
Available at IGC - Instituto de Geociências (MP M14-235 )(GetIt)