@misc{indiciaed76e15417a45,
  title = {Contributions to economic geology, 1908, Part I, Metals and nonmetals except fuels--Cement and Concrete Materials},
  author = {G. C. Martin},
  year = {1909},
  doi = {10.3133/b380j},
  url = {https://pubs.usgs.gov/publication/b380J},
  note = {Source identifier: b380J}
}