@misc{indiciae9ce1533489dc,
  title = {The mineral resources of the Sierra Nevada de Santa Marta, Columbia (Zone I)},
  author = {Charles McFarland Tschanz and Andres Jimeno V. and Jaime B. Cruz},
  year = {1970},
  doi = {10.3133/ofr70329},
  url = {https://pubs.usgs.gov/publication/ofr70329},
  note = {Source identifier: ofr70329}
}