@misc{indiciaecdbe5b7e4c4b,
  title = {Gold investigations in Precambrian clastic and pelitic rocks, southwestern Colorado and northern New Mexico},
  author = {Fred Barker},
  year = {1969},
  doi = {10.3133/b1272f},
  url = {https://pubs.usgs.gov/publication/b1272F},
  note = {Source identifier: b1272F}
}