@misc{indiciae35ea683f0535,
  title = {Exploratory drilling in the Coalmont coal field, Jackson County, Colorado, June-November 1977},
  author = {Dawn H. Madden},
  year = {1977},
  doi = {10.3133/ofr77887},
  url = {https://pubs.usgs.gov/publication/ofr77887},
  note = {Source identifier: ofr77887}
}