Coal Mining in the Bighorn Coal Basin of Wyoming (1975)

Glass, G.B, Westervelt, Katherine, and Oviatt, C.G., 1975, Coal mining in the Bighorn coal basin of Wyoming: Geological Survey of Wyoming [Wyoming State Geological Survey] Reprint 30, p. 221–228. (Reprinted from Wyoming Geological Association Twenty-Seventh Annual Field Conference Guidebook, 1975.)