@misc{indiciae7e2d69a0b7aa,
  title = {Geochemistry of coalbed gas - a review},
  author = {J.L. Clayton},
  year = {1998},
  doi = {10.1016/s0166-5162(97)00017-7},
  url = {https://pubs.usgs.gov/publication/70020738},
  note = {Source identifier: 70020738}
}