@misc{indiciae919e60b8f7cc,
  title = {Geologic map of Lake Valley manganese district, Sierra County, New Mexico},
  author = {S. C. Creasey and A.E. Granger},
  year = {1953},
  doi = {10.3133/mf9},
  url = {https://pubs.usgs.gov/publication/mf9},
  note = {Source identifier: mf9}
}