@misc{indiciae6c6b20e64133,
  title = {Fractal lognormal percentage assessment of technically recoverable natural gas resources in continuous-type and coal-bed (unconventional) plays, onshore and state waters of the United States},
  author = {R. A. Crovelli and J. W. Schmoker and R.H. Balay},
  year = {1995},
  doi = {10.3133/ofr95647},
  url = {https://pubs.usgs.gov/publication/ofr95647},
  note = {Source identifier: ofr95647}
}