@misc{indiciae6141a065843f,
  title = {Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Glass-making Materials},
  author = {Ernest Francis Burchard},
  year = {1907},
  doi = {10.3133/b315k},
  url = {https://pubs.usgs.gov/publication/b315K},
  note = {Source identifier: b315K}
}