@misc{indiciaeabf0d907a381,
  title = {Unconventional natural gas resources on U.S. federal lands},
  author = {Robert A. Crovelli and J. W. Schmoker and Vito F. Nuccio},
  year = {1998},
  doi = {10.3133/fs03098},
  url = {https://pubs.usgs.gov/publication/fs03098},
  note = {Source identifier: fs03098}
}