@misc{indiciaef2e3ca9b6b5f,
  title = {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},
  author = {Carol Waite Connor and Laura R. Biewick},
  year = {1989},
  doi = {10.3133/ofr896},
  url = {https://pubs.usgs.gov/publication/ofr896},
  note = {Source identifier: ofr896}
}