@misc{indiciaed06e15b3bb11,
  title = {Contributions to economic geology (short papers and preliminary reports), 1933},
  author = {Gerald F. Loughlin},
  year = {1934},
  doi = {10.3133/b846},
  url = {https://pubs.usgs.gov/publication/b846},
  note = {Source identifier: b846}
}