@misc{indiciaec9f0fbad164b,
  title = {Unconventional energy resources: 2007-2008 review},
  author = {Peter D. Warwick and American Association of Petroleum Geologists, Energy Minerals Division},
  year = {2009},
  doi = {10.1007/s11053-009-9094-0},
  url = {https://pubs.usgs.gov/publication/70035038},
  note = {Source identifier: 70035038}
}