@misc{indiciaed6547373569e,
  title = {Spectrophotometric-isotope dilution determination of arsenic in soils and rock},
  author = {F. W. Brown and F.O. Simon and L. P. Greenland},
  year = {1975},
  url = {https://pubs.usgs.gov/publication/70164422},
  note = {Source identifier: 70164422}
}