@misc{indiciaea979035bb907,
  title = {Map of assessed tight-gas resources in the United States},
  author = {Laura R. H. Biewick and USGS National Assessment of Oil and Gas Resources Team},
  year = {2014},
  doi = {10.3133/ds69hh},
  url = {https://pubs.usgs.gov/publication/ds69HH},
  note = {Source identifier: ds69HH}
}