@misc{indiciae7243f1382e31,
  title = {Estimates of unconventional natural-gas resources of the Devonian shale of the Appalachian Basin},
  author = {Ronald R. Charpentier and Wallace De Witt and George E. Claypool and Larry D. Harris and R. F. Mast and J.D. Megeath and J.B. Roen and J. W. Schmoker},
  year = {1982},
  doi = {10.3133/ofr82474},
  url = {https://pubs.usgs.gov/publication/ofr82474},
  note = {Source identifier: ofr82474}
}