@misc{indiciaeb2428ac7ef89,
  title = {Changes in water quality of Michigan streams near urban areas, 1973-84},
  author = {D. J. Holtschlag},
  year = {1987},
  doi = {10.3133/wri874035},
  url = {https://pubs.usgs.gov/publication/wri874035},
  note = {Source identifier: wri874035}
}