@misc{indiciaecafeef7968f2,
  title = {Geologic map of the Sayle Quadrangle, Powder River County, Montana},
  author = {M.W. McLellan and L. H. Biewick},
  year = {1987},
  doi = {10.3133/mf1961},
  url = {https://pubs.usgs.gov/publication/mf1961},
  note = {Source identifier: mf1961}
}