TY  - RPRT
TI  - Trends in pesticide concentrations and use for major rivers of the United States
AU  - Karen R. Ryberg
AU  - Robert J. Gilliom
PY  - 2015
DO  - 10.1016/j.scitotenv.2015.06.095
UR  - https://pubs.usgs.gov/publication/70157110
ID  - 70157110
ER  -