@misc{indiciae21310d08bee5,
  title = {Digital geologic map and GIS database of Venezuela},
  author = {Christopher P. Garrity and Paul C. Hackley and Franco Urbani},
  year = {2006},
  doi = {10.3133/ds199},
  url = {https://pubs.usgs.gov/publication/ds199},
  note = {Source identifier: ds199}
}