@misc{indiciae70f94c820d16,
  title = {Summary of the research work of the Trace Elements Section, Geochemistry and Petrology Branch for the period October 1-December 31, 1951},
  year = {1952},
  doi = {10.3133/tei218},
  url = {https://pubs.usgs.gov/publication/tei218},
  note = {Source identifier: tei218}
}