@misc{indiciae54dd5a112774,
  title = {Preliminary report of 1977 coal drilling in eastern Montana and northeastern Wyoming: Geophysical logs for 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 = {1977},
  doi = {10.3133/ofr77721b},
  url = {https://pubs.usgs.gov/publication/ofr77721B},
  note = {Source identifier: ofr77721B}
}