@misc{indiciae28d54cfefd8a,
  title = {Walden Pond, Massachusetts: Environmental setting and current investigations},
  author = {John A. Colman and Marcus C. Waldron},
  year = {1998},
  doi = {10.3133/fs06498},
  url = {https://pubs.usgs.gov/publication/fs06498},
  note = {Source identifier: fs06498}
}