@misc{indiciaeb88211c04e91,
  title = {Comparison of natural gas assessments},
  author = {T. S. Dyman and J. W. Schmoker},
  year = {1997},
  doi = {10.3133/ofr97445},
  url = {https://pubs.usgs.gov/publication/ofr97445},
  note = {Source identifier: ofr97445}
}