@misc{indiciaebb1c92a43e1b,
  title = {Contributions to economic geology (short papers and preliminary reports): Part II. - Mineral fuels},
  author = {Marius Robinson Campbell and David White},
  year = {1916},
  doi = {10.3133/b621},
  url = {https://pubs.usgs.gov/publication/b621},
  note = {Source identifier: b621}
}