@misc{indiciae526321e608ef,
  title = {Contributions to economic geology, 1912; Part I, Metals and nonmetals except fuels--Sulphur and Pyrite},
  author = {Donnel Foster Hewett},
  year = {1914},
  doi = {10.3133/b540r},
  url = {https://pubs.usgs.gov/publication/b540R},
  note = {Source identifier: b540R}
}