@misc{indiciae48c4e6d36daf,
  title = {Geologic shaded relief map of Venezuela},
  author = {Paul C. Hackley and Franco Urbani and Alex W. Karlsen and Christopher P. Garrity},
  year = {2005},
  doi = {10.3133/ofr20051038},
  url = {https://pubs.usgs.gov/publication/ofr20051038},
  note = {Source identifier: ofr20051038}
}