@misc{indiciae5535449ca4a4,
  title = {Contributions to economic geology (short papers and preliminary reports), 1929 : Part I. - Metals and nonmetals except fuels},
  author = {Gerald Francis Loughlin and George Rogers Mansfield and E. F. Burchard},
  year = {1930},
  doi = {10.3133/b811},
  url = {https://pubs.usgs.gov/publication/b811},
  note = {Source identifier: b811}
}