@misc{indiciae709243fb4b90,
  title = {Branch of Petroleum Geology bibliography 1991},
  author = {Helen Y. Colburn},
  year = {1992},
  doi = {10.3133/ofr92506},
  url = {https://pubs.usgs.gov/publication/ofr92506},
  note = {Source identifier: ofr92506}
}