TY  - RPRT
TI  - Hydrology and trophic ecology of Walden Pond, Concord, Massachusetts
AU  - Paul J. Friesz
AU  - John A. Colman
PY  - 2001
DO  - 10.3133/wri014153
UR  - https://pubs.usgs.gov/publication/wri014153
ID  - wri014153
ER  -