@misc{indiciaeff949eb26f2a,
  title = {Core-hole drilling and coal analysis report for nine holes drilled during 1977 in the Nucla coal field, Montrose County, Colorado},
  author = {David Vincent Haines},
  year = {1978},
  doi = {10.3133/ofr78899},
  url = {https://pubs.usgs.gov/publication/ofr78899},
  note = {Source identifier: ofr78899}
}