@misc{indiciaebbd3e6480b66,
  title = {Contributions to economic geology 1908: Part II - Mineral fuels},
  author = {Marius Robinson Campbell},
  year = {1910},
  doi = {10.3133/b381},
  url = {https://pubs.usgs.gov/publication/b381},
  note = {Source identifier: b381}
}