@misc{indiciae9298687914ea,
  title = {A zonal evaluation of intrinsic susceptibility in selected principal aquifers of the United States},
  author = {Tristan P. Wellman and Leon Kauffman and Brian Clark},
  year = {2012},
  doi = {10.1016/j.jhydrol.2012.03.012},
  url = {https://pubs.usgs.gov/publication/70009606},
  note = {Source identifier: 70009606}
}