@misc{indiciaec087c9f617f4,
  title = {The Upton-Thornton oil field, Wyoming},
  author = {E.T. Hancock},
  year = {1921},
  doi = {10.3133/b716b},
  url = {https://pubs.usgs.gov/publication/b716B},
  note = {Source identifier: b716B}
}