@misc{indiciaeda1ff18d5078,
  title = {Geology and mineral deposits of an area in the Departments of Antioquia and Caldas (Subzone IIB), Colombia},
  author = {Tomas Feininger and Dario Barrero L. and Nestor Castro and R.B. Hall},
  year = {1973},
  doi = {10.3133/ofr7369},
  url = {https://pubs.usgs.gov/publication/ofr7369},
  note = {Source identifier: ofr7369}
}