@misc{indiciae60c149ba6907,
  title = {Residues of persistent pesticides decreasing},
  author = {J.B. Graves and G.U. Mayfield and J.D. Newsom},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/5221692},
  note = {Source identifier: 5221692}
}