@misc{indiciae9045113610a0,
  title = {Hydrochemical Regions of the Glacial Aquifer System, Northern United States, and Their Environmental and Water-Quality Characteristics},
  author = {Terri Arnold and Kelly L. Warner and George E. Groschen and James P. Caldwell and Stephen J. Kalkhoff},
  year = {2008},
  doi = {10.3133/sir20085015},
  url = {https://pubs.usgs.gov/publication/sir20085015},
  note = {Source identifier: sir20085015}
}