@misc{indiciae25021965fdad,
  title = {Contributions to economic geology, 1908, Part I, Metals and nonmetals except fuels--Clays},
  author = {G.C. Matson},
  year = {1909},
  doi = {10.3133/b380k},
  url = {https://pubs.usgs.gov/publication/b380K},
  note = {Source identifier: b380K}
}