@misc{indiciaedf8a65a13fdf,
  title = {Claim map, Hamm Canyon quadrangle, San Miguel County, Colorado},
  author = {Raymond Dewey Sample and H. F. Albee and Hal G. Stephens},
  year = {1961},
  doi = {10.3133/ofr61141},
  url = {https://pubs.usgs.gov/publication/ofr61141},
  note = {Source identifier: ofr61141}
}