@misc{indiciaefea37e15ea33,
  title = {Assessment of undiscovered natural gas resources in Devonian black shales, Appalachian basin, eastern U.S.A.},
  author = {Robert C. Milici},
  year = {2005},
  doi = {10.3133/ofr20051268},
  url = {https://pubs.usgs.gov/publication/ofr20051268},
  note = {Source identifier: ofr20051268}
}