@misc{indiciae5faac65f3fd8,
  title = {The Niobrara Formation as a challenge to water quality in the Arkansas River, Colorado, USA},
  author = {Carleton R. Bern and Stogner},
  year = {2017},
  doi = {10.1016/j.ejrh.2017.05.001},
  url = {https://pubs.usgs.gov/publication/70188789},
  note = {Source identifier: 70188789}
}