@misc{indiciae18994bfb936a,
  title = {Coal resources, reserves and peak coal production in the United States},
  author = {Robert C. Milici and Romeo M. Flores and Gary D. Stricker},
  year = {2013},
  doi = {10.1016/j.coal.2012.10.002},
  url = {https://pubs.usgs.gov/publication/70046064},
  note = {Source identifier: 70046064}
}