TY - RPRT TI - Coal resource occurrence and coal development potential maps of the Lacey Gulch Quadrangle, Rosebud County, Montana AU - W. J. Mapel AU - B. K. Martin AU - B. A. Butler PY - 1978 DO - 10.3133/ofr7837 UR - https://pubs.usgs.gov/publication/ofr7837 ID - ofr7837 ER -