@misc{indiciae857723e3ef54,
  title = {Contributions to economic geology (short papers and preliminary reports) 1912: Part II - Mineral fuels},
  author = {Marius Robinson Campbell},
  year = {1914},
  doi = {10.3133/b541},
  url = {https://pubs.usgs.gov/publication/b541},
  note = {Source identifier: b541}
}