@misc{indiciae8cb3a91f93f6,
  title = {Correlation of shallow lignite beds in the Denver Formation near Watkins, Colorado, using lithologic and gamma ray logs},
  author = {J. D. Sanchez},
  year = {1976},
  doi = {10.3133/ofr76279},
  url = {https://pubs.usgs.gov/publication/ofr76279},
  note = {Source identifier: ofr76279}
}