@misc{indiciaea1f72fea1f8b,
  title = {Map showing some potential effects of surface mining of the Wyodak-Anderson coal, Gillette area, Campbell County, Wyoming},
  author = {R. F. Hadley and W. R. Keefer},
  year = {1975},
  doi = {10.3133/i848f},
  url = {https://pubs.usgs.gov/publication/i848F},
  note = {Source identifier: i848F}
}