@misc{indiciaea7e69bb07639,
  title = {Influence of natural factors on the quality of midwestern streams and rivers},
  author = {Stephen D. Porter and Mitchell A. Harris and Stephen J. Kalkhoff},
  year = {2001},
  doi = {10.3133/wri004288},
  url = {https://pubs.usgs.gov/publication/wri004288},
  note = {Source identifier: wri004288}
}