@misc{indiciae23ed6fcbac07,
  title = {Chemical quality of water in the Walnut River basin, south-central Kansas},
  author = {R. B. Leonard},
  year = {1968},
  doi = {10.3133/ofr68167},
  url = {https://pubs.usgs.gov/publication/ofr68167},
  note = {Source identifier: ofr68167}
}