@misc{indiciaeb11797db4cf1,
  title = {Geologic map of the Zipaquira Quadrangle (K-11), Colombia},
  author = {D.H. McLaughlin and Marino Arce Herrera},
  year = {1975},
  doi = {10.3133/i849},
  url = {https://pubs.usgs.gov/publication/i849},
  note = {Source identifier: i849}
}