TY  - RPRT
TI  - Coal resource occurrence and coal development potential maps of the Elk Ridge quadrangle, Powder River County, Montana
AU  - Colorado School of Mines
PY  - 1979
DO  - 10.3133/ofr7985
UR  - https://pubs.usgs.gov/publication/ofr7985
ID  - ofr7985
ER  -