@misc{indiciae7539b63c5af8,
  title = {The Duncan gas field, Stephens County, Oklahoma},
  author = {C. H. Wegemann},
  year = {1916},
  doi = {10.3133/b621d},
  url = {https://pubs.usgs.gov/publication/b621D},
  note = {Source identifier: b621D}
}