@misc{indiciae197975701c2f,
  title = {Occurrence of selected minor elements in the waters of California},
  author = {William Dudley Silvey},
  year = {1967},
  doi = {10.3133/wsp1535l},
  url = {https://pubs.usgs.gov/publication/wsp1535L},
  note = {Source identifier: wsp1535L}
}