@misc{indiciaed8013f814649,
  title = {Aeromagnetic map of part of the southern Powder River basin, Wyoming},
  author = {Joseph S. Duval and J. A. Pitkin and David L. Macke},
  year = {1977},
  doi = {10.3133/ofr77621},
  url = {https://pubs.usgs.gov/publication/ofr77621},
  note = {Source identifier: ofr77621}
}