@misc{indiciae6df53f3c23c9,
  title = {Geology and ore deposits of the Magdalena mining district, New Mexico},
  author = {G. F. Loughlin and A. H. Koschmann},
  year = {1942},
  doi = {10.3133/pp200},
  url = {https://pubs.usgs.gov/publication/pp200},
  note = {Source identifier: pp200}
}