@misc{indiciaeae7416212284,
  title = {Residue method for common minor elements},
  author = {Joseph Haffty},
  year = {1960},
  doi = {10.3133/wsp1540a},
  url = {https://pubs.usgs.gov/publication/wsp1540A},
  note = {Source identifier: wsp1540A}
}