@misc{indiciaed2d1e8825a1f,
  title = {Geologic controls of deep natural gas resources in the United States},
  author = {Dudley D. Rice and P. A. Westcott},
  year = {1997},
  doi = {10.3133/b2146},
  url = {https://pubs.usgs.gov/publication/b2146},
  note = {Source identifier: b2146}
}