@misc{indiciaed5a8e1aa9a78,
  title = {Geologic map of the Pamplona Quadrangle (H-13), Columbia},
  author = {D.E. Ward and Richard Goldsmith and Jaime B. Cruz and Luis C. Jaramillo and Rodrigo I. Vargas},
  year = {1977},
  doi = {10.3133/i1006},
  url = {https://pubs.usgs.gov/publication/i1006},
  note = {Source identifier: i1006}
}