@misc{indiciae07e357676197,
  title = {The quality of our Nation's waters: Water quality in the glacial aquifer system, northern United States, 1993-2009},
  author = {Kelly L. Warner and Joseph D. Ayotte},
  year = {2015},
  doi = {10.3133/cir1352},
  url = {https://pubs.usgs.gov/publication/cir1352},
  note = {Source identifier: cir1352}
}