@misc{indiciae3c97b472f65d,
  title = {Hydrology and trophic ecology of Walden Pond, Concord, Massachusetts},
  author = {Paul J. Friesz and John A. Colman},
  year = {2001},
  doi = {10.3133/wri014153},
  url = {https://pubs.usgs.gov/publication/wri014153},
  note = {Source identifier: wri014153}
}