@misc{indiciae944ead34bbc9,
  title = {Contributions to economic geology, 1912; Part I, Metals and nonmetals except fuels--Structural Materials},
  author = {Clyde Maxwell Bauer and Robert Wallace Pack and J. F. Hunter},
  year = {1914},
  doi = {10.3133/b540k},
  url = {https://pubs.usgs.gov/publication/b540K},
  note = {Source identifier: b540K}
}