@misc{indiciae74b79973a14b,
  title = {Contributions to economic geology, 1955},
  author = {Earle R. Cressman},
  year = {1956},
  doi = {10.3133/b1027},
  url = {https://pubs.usgs.gov/publication/b1027},
  note = {Source identifier: b1027}
}