@misc{indiciae20ffd08612ee,
  title = {A regional monitoring network to investigate the occurrence of agricultural chemicals in near-surface aquifers of the midcontinental USA},
  author = {D.W. Kolpin and D. A. Goolsby},
  year = {1995},
  url = {https://pubs.usgs.gov/publication/70169088},
  note = {Source identifier: 70169088}
}