@misc{indiciae2410bff0bab5,
  title = {Contributions to economic geology (short papers and preliminary reports), 1920 : Part II. - Mineral fuels},
  author = {David White and G. H. Ashley and M. R. Campbell},
  year = {1917},
  doi = {10.3133/b641},
  url = {https://pubs.usgs.gov/publication/b641},
  note = {Source identifier: b641}
}