@misc{indiciaeee821edfad93,
  title = {Geohydrology and limnology of Walden Pond, Concord, Massachusetts},
  author = {John A. Colman and Paul J. Friesz},
  year = {2001},
  doi = {10.3133/wri014137},
  url = {https://pubs.usgs.gov/publication/wri014137},
  note = {Source identifier: wri014137}
}