TY  - RPRT
TI  - Nutrients in the upper Mississippi River : scientific information to support management decisions
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 2003
DO  - 10.3133/fs10503
UR  - https://pubs.usgs.gov/publication/fs10503
ID  - fs10503
ER  -