@misc{indiciae7a3723fbe964,
  title = {Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Clays and Clay Products},
  author = {John T. Porter and Charles Butts and Millard King Shaler and J.H. Gardner and Jethro Otto Veatch and Nevin Melancthon Fenneman and George W. Stose and Edwin F. Lines and William Clifton Phalen and Lawrence Martin},
  year = {1907},
  doi = {10.3133/b315i},
  url = {https://pubs.usgs.gov/publication/b315I},
  note = {Source identifier: b315I}
}