@misc{indiciaece642d7c7781,
  title = {Mapa Geologico de Venezuela a Escala 1:750,000},
  author = {Paul C. Hackley and Franco Urbani and Alex W. Karlsen and Christopher P. Garrity},
  year = {2006},
  doi = {10.3133/ofr20061109},
  url = {https://pubs.usgs.gov/publication/ofr20061109},
  note = {Source identifier: ofr20061109}
}