@misc{indiciae4c6a006a5a08,
  title = {Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Phosphates and Phosphorus},
  author = {Fred Boughton Weeks and W.F. Ferrier and Albert Homer Purdue and George W. Stose},
  year = {1907},
  doi = {10.3133/b315p},
  url = {https://pubs.usgs.gov/publication/b315P},
  note = {Source identifier: b315P}
}