@misc{indiciae50b8c9af150b,
  title = {Geochemical Exploration Techniques Applicable in the Search for Copper Deposits},
  author = {Maurice A. Chaffee},
  year = {1975},
  doi = {10.3133/pp907b},
  url = {https://pubs.usgs.gov/publication/pp907B},
  note = {Source identifier: pp907B}
}