@misc{indiciae377eda6a3bda,
  title = {Summary of 1972 oil and gas statistics for onshore and offshore areas of 151 countries},
  author = {Sherwood E. Frezon},
  year = {1974},
  doi = {10.3133/pp885},
  url = {https://pubs.usgs.gov/publication/pp885},
  note = {Source identifier: pp885}
}