@misc{indiciaefb9fda731f05,
  title = {Preliminary report of coal drill-hole data and chemical analyses of coal beds in Sheridan and Campbell Counties, Wyoming, and Big Horn County, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey and Montana Bureau of Mines and Geology},
  year = {1973},
  doi = {10.3133/ofr73351},
  url = {https://pubs.usgs.gov/publication/ofr73351},
  note = {Source identifier: ofr73351}
}