@misc{indiciae875df9e6f276,
  title = {Contributions to economic geology, 1905 : Miscellaneous Nonmetals},
  author = {L.H. Woolsey and G. O. Smith},
  year = {1906},
  doi = {10.3133/b285o},
  url = {https://pubs.usgs.gov/publication/b285O},
  note = {Source identifier: b285O}
}