@misc{indiciae0d66f318e6e6,
  title = {Heavy oil and natural bitumen deposits of Latin America},
  author = {R. F. Meyer and Gerard S. Medaisko},
  year = {1991},
  doi = {10.3133/ofr91364},
  url = {https://pubs.usgs.gov/publication/ofr91364},
  note = {Source identifier: ofr91364}
}