@misc{indiciae9b8853b1b835,
  title = {Importance of closely spaced vertical sampling in delineating chemical and microbiological gradients in groundwater studies},
  author = {R. L. Smith and R.W. Harvey and D.R. LeBlanc},
  year = {1991},
  doi = {10.1016/0169-7722(91)90032-v},
  url = {https://pubs.usgs.gov/publication/70016696},
  note = {Source identifier: 70016696}
}