@misc{indiciaedd7dfce94401,
  title = {Falling-stream turbidimeter as a means of measuring sediment concentrations in streams},
  author = {Harold P. Guy and Richard C. Olson},
  year = {1972},
  doi = {10.3133/70173978},
  url = {https://pubs.usgs.gov/publication/70173978},
  note = {Source identifier: 70173978}
}