Coal resource occurrence and coal development potential maps of the Pine Butte School qQadrangle, Big Horn County, Montana [unknown]

William Craven Culbertson, L.N. Robinson, T.M. Gaffke
1978 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr78652 fatcat:hptvizsvcbcndmutxtasr2kp7y