@misc{indiciaedb8dd5cf4383,
  title = {Coalbed methane resource potential and current prospects in Pennsylvania},
  author = {A.K. Markowski},
  year = {1998},
  doi = {10.1016/s0166-5162(98)00036-6},
  url = {https://pubs.usgs.gov/publication/70020263},
  note = {Source identifier: 70020263}
}