TY  - RPRT
TI  - Nutrients in the Nation's Waters--Too Much of a Good Thing?
AU  - David K. Mueller
AU  - Dennis R. Helsel
PY  - 1996
DO  - 10.3133/cir1136
UR  - https://pubs.usgs.gov/publication/cir1136
ID  - cir1136
ER  -