@misc{indiciaed8212e6cc073,
  title = {Advances in solid-phase extraction disks for environmental chemistry},
  author = {E.M. Thurman and K. Snavely},
  year = {2000},
  doi = {10.1016/s0165-9936(99)00175-2},
  url = {https://pubs.usgs.gov/publication/70022484},
  note = {Source identifier: 70022484}
}