@misc{indiciaeebe474d563f5,
  title = {Coalbed natural gas exploration, drilling activities, and geologic test results, 2007-2010},
  author = {Arthur C. Clark},
  year = {2014},
  doi = {10.3133/ofr20141004},
  url = {https://pubs.usgs.gov/publication/ofr20141004},
  note = {Source identifier: ofr20141004}
}