@misc{indiciaed04d2a2ecd4b,
  title = {Geophysical logs of seventeen holes drilled in 1976 in the Yampa coal field, northwestern Colorado},
  author = {Michael E. Brownfield},
  year = {1976},
  doi = {10.3133/ofr76817},
  url = {https://pubs.usgs.gov/publication/ofr76817},
  note = {Source identifier: ofr76817}
}