@misc{indiciaec75752e180a1,
  title = {Properties and chemical constituents in ground water from the Mississippi River Valley alluvial aquifer and permeable zone A (Holocene-upper Pleistocene deposits) south-central United States},
  author = {Robert A. Pettijohn and John F. Busby and Jeffery D. Beckman},
  year = {1992},
  doi = {10.3133/wri914149},
  url = {https://pubs.usgs.gov/publication/wri914149},
  note = {Source identifier: wri914149}
}