@misc{indiciae0b8063a18f0b,
  title = {Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Abrasive Materials},
  author = {Ralph Arnold and Robert Anderson},
  year = {1907},
  doi = {10.3133/b315o},
  url = {https://pubs.usgs.gov/publication/b315O},
  note = {Source identifier: b315O}
}