@misc{indiciae1561fbe90cee,
  title = {Assessment of conventionally recoverable petroleum resources of southeastern Mexico, northern Guatemala, and Belize},
  author = {Charles D. Masters and James A. Peterson},
  year = {1981},
  doi = {10.3133/ofr811144},
  url = {https://pubs.usgs.gov/publication/ofr811144},
  note = {Source identifier: ofr811144}
}