TY  - RPRT
TI  - The quality of our nation's waters; nutrients and pesticides; a summary
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1999
DO  - 10.3133/fs11699
UR  - https://pubs.usgs.gov/publication/fs11699
ID  - fs11699
ER  -