@misc{indiciae97dcd1a0b56d,
  title = {USGS Branch of Petroleum Geology bibliography, 1988},
  author = {Helen Colburn},
  year = {1989},
  doi = {10.3133/ofr89477},
  url = {https://pubs.usgs.gov/publication/ofr89477},
  note = {Source identifier: ofr89477}
}