@misc{indiciae2db51b30c7d0,
  title = {Geologic factors that control mineral matter in coal},
  author = {C. B. Cecil and R.W. Stanton and F.T. Dulong and J.J. Renton},
  year = {1982},
  doi = {10.1007/978-1-4684-4133-8\_23},
  url = {https://pubs.usgs.gov/publication/70188938},
  note = {Source identifier: 70188938}
}