TY  - RPRT
TI  - Coal resource occurrence and coal development potential maps of the Black Spring Quadrangle, Rosebud and Big Horn Counties, Montana
AU  - Colorado School of Mines Research Institute
PY  - 1979
DO  - 10.3133/ofr793
UR  - https://pubs.usgs.gov/publication/ofr793
ID  - ofr793
ER  -