@misc{indiciae38da77524554,
  title = {Geologic map of eastern Antioquia Department, Colombia Quadrangle I-9, and parts of quadrangles H-9, H-10, I-10, J-9, and J-10},
  author = {Tomas Feininger and Dario Barrero and Nestor Castro and Octavio Ramirez and Hernando Lozano and Jairo Vesga},
  year = {1975},
  doi = {10.3133/i860},
  url = {https://pubs.usgs.gov/publication/i860},
  note = {Source identifier: i860}
}