TY - RPRT TI - Drill-hole and surface-section data, Fort Union Formation, Bull Mountain coal field, south-central Montana; 209 records as entered in the National Coal Resources Data System AU - Carol Waite Connor AU - Laura R. Biewick PY - 1989 DO - 10.3133/ofr896 UR - https://pubs.usgs.gov/publication/ofr896 ID - ofr896 ER -