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 /
|Main Author:||Connor, Carol Waite.|
|Other Authors:||Biewick, Laura H., Geological Survey (U.S.)|
[Denver, CO] :
U.S. Geological Survey,
305 leaves : illustrations, maps ; 28 cm.
U.S. Geological Survey open-file report ;