@misc{indiciaefed9a2e609cc,
  title = {Selectivity and effectiveness of extractants used to release metals associated with organic matter},
  author = {C. S.E. Papp and L.H. Filipek and K. S. Smith},
  year = {1991},
  doi = {10.1016/0883-2927(91)90010-m},
  url = {https://pubs.usgs.gov/publication/70016510},
  note = {Source identifier: 70016510}
}