@misc{indiciaed0376d445169,
  title = {Chemical analysis, physical property tests, and lithologic description of cores and cuttings of lignite and overburden rocks from an area near Watkins, Colorado},
  author = {J. D. Sanchez and Robert G. Hobbs},
  year = {1977},
  doi = {10.3133/ofr77628},
  url = {https://pubs.usgs.gov/publication/ofr77628},
  note = {Source identifier: ofr77628}
}