@misc{indiciaefd7f9907402d,
  title = {Using diatom assemblages to assess urban stream conditions},
  author = {C. E. Walker and Y. Pan},
  year = {2006},
  doi = {10.1007/s10750-005-1613-3},
  url = {https://pubs.usgs.gov/publication/70030421},
  note = {Source identifier: 70030421}
}