@misc{indiciae46c8967c1ddd,
  title = {Preliminary report of 1977 coal drilling in eastern Montana and northeastern Wyoming: Geophysical logs for Big Horn, Fallon, and Powder River Counties, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey and Montana Bureau of Mines and Geology},
  year = {1977},
  doi = {10.3133/ofr77721a},
  url = {https://pubs.usgs.gov/publication/ofr77721A},
  note = {Source identifier: ofr77721A}
}