@misc{indiciae4c57f81ae9ef,
  title = {Contributions to economic geology (short papers and preliminary reports) 1910: Part II - Mineral fuels},
  author = {Marius Robinson Campbell},
  year = {1912},
  doi = {10.3133/b471},
  url = {https://pubs.usgs.gov/publication/b471},
  note = {Source identifier: b471}
}