@misc{indiciae7b2f1ab0ae27,
  title = {The United Nations Framework Classification for World Petroleum Resources},
  author = {Thomas S. Ahlbrandt and P. Blystad and E.D. Young and S. Slavov and S. Heiberg},
  year = {2003},
  url = {https://pubs.usgs.gov/publication/70025273},
  note = {Source identifier: 70025273}
}