@misc{indiciaefca35099a928,
  title = {Geologic map of the Moorhead Quadrangle, Powder River County, Montana, and Campbell County, Wyoming},
  author = {M.W. McLellan and L. H. Biewick},
  year = {1989},
  doi = {10.3133/i1969},
  url = {https://pubs.usgs.gov/publication/i1969},
  note = {Source identifier: i1969}
}