@misc{indiciae24a4e55bcef1,
  title = {Bibliography and index of U.S. Geological Survey trace elements and related reports through June 1956},
  author = {Paul E. Soister and Dora R. Conklin and Mary D. Bowman and Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1956},
  doi = {10.3133/tei600},
  url = {https://pubs.usgs.gov/publication/tei600},
  note = {Source identifier: tei600}
}