TY - RPRT TI - Federal coal resource occurrence and coal development potential maps of the Hard Ground Flats 7 1/2-minute Quadrangle, McKinley County, New Mexico AU - Berge Exploration Inc. PY - 1985 DO - 10.3133/ofr8028 UR - https://pubs.usgs.gov/publication/ofr8028 ID - ofr8028 ER -