TY  - RPRT
TI  - Coal resource occurrence and coal development potential maps of the Volborg Quadrangle, Custer and Powder River counties, Montana
AU  - Colorado School of Mines Research Institute
PY  - 1979
DO  - 10.3133/ofr7919
UR  - https://pubs.usgs.gov/publication/ofr7919
ID  - ofr7919
ER  -