@misc{indiciae33a027c38f1e,
  title = {Radiometric scanning of collections of Keweenawan rocks of the Michigan copper district},
  author = {Walter Stanley White},
  year = {1950},
  doi = {10.3133/tem34},
  url = {https://pubs.usgs.gov/publication/tem34},
  note = {Source identifier: tem34}
}