@misc{indiciaeb2d8dd50114e,
  title = {Analytical methods used in geochemical exploration by the U.S. Geological Survey},
  author = {Frederick Norville Ward and H. W. Lakin and F. C. Canney and and others},
  year = {1963},
  doi = {10.3133/b1152},
  url = {https://pubs.usgs.gov/publication/b1152},
  note = {Source identifier: b1152}
}