@misc{indiciae9e1b203dec9c,
  title = {Tapping methane hydrates for unconventional natural gas},
  author = {Carolyn Ruppel},
  year = {2007},
  doi = {10.2113/gselements.3.3.193},
  url = {https://pubs.usgs.gov/publication/70120941},
  note = {Source identifier: 70120941}
}