@misc{indiciae60e0dbb24177,
  title = {Geologic province map of the Venezuelan Guiana Shield},
  author = {G.B. Sidder},
  year = {1990},
  doi = {10.3133/ofr9073},
  url = {https://pubs.usgs.gov/publication/ofr9073},
  note = {Source identifier: ofr9073}
}