@misc{indiciaef791d94c2ee0,
  title = {Contributions to economic geology, 1908, Part I, Metals and nonmetals except fuels--Sulphur and Pyrite},
  author = {E. G. Woodruff},
  year = {1909},
  doi = {10.3133/b380m},
  url = {https://pubs.usgs.gov/publication/b380M},
  note = {Source identifier: b380M}
}