@misc{indiciaee27b7e8dafc4,
  title = {Water-level maps of the Mississippi River Valley alluvial aquifer in eastern Arkansas, 1987},
  author = {Paul W. Westerfield},
  year = {1990},
  doi = {10.3133/wri904089},
  url = {https://pubs.usgs.gov/publication/wri904089},
  note = {Source identifier: wri904089}
}