@misc{indiciaefb2248e428fd,
  title = {Hydrates of natural gas; a review of their geologic occurrence},
  author = {Keith A. Kvenvolden and Mark A. McMenamin},
  year = {1980},
  doi = {10.3133/cir825},
  url = {https://pubs.usgs.gov/publication/cir825},
  note = {Source identifier: cir825}
}