@misc{indiciaed6f5e2bb3050,
  title = {Chemical character of ground waters of the northern Great Plains},
  author = {H.B. Riffenburg},
  year = {1925},
  doi = {10.3133/wsp560b},
  url = {https://pubs.usgs.gov/publication/wsp560B},
  note = {Source identifier: wsp560B}
}