@misc{indiciaebd3e61356588,
  title = {ArcView Coal Evaluation User's Guide},
  author = {William Watson},
  year = {2007},
  doi = {10.3133/ofr20071091},
  url = {https://pubs.usgs.gov/publication/ofr20071091},
  note = {Source identifier: ofr20071091}
}