@misc{indiciae824131070f3b,
  title = {Geologic map of the Curlew quadrangle, Ferry County, Washington},
  author = {James Alfred Calkins and R. L. Parker and Alan Eastman Disbrow},
  year = {1959},
  doi = {10.3133/ofr5915},
  url = {https://pubs.usgs.gov/publication/ofr5915},
  note = {Source identifier: ofr5915}
}