TY  - RPRT
TI  - Herbicides and herbicide degradation products in upper midwest agricultural streams during august base-flow conditions
AU  - S. J. Kalkhoff
AU  - K. E. Lee
AU  - S. D. Porter
AU  - P. J. Terrio
AU  - E.M. Thurman
PY  - 2003
DO  - 10.2134/jeq2003.1025
UR  - https://pubs.usgs.gov/publication/70025708
ID  - 70025708
ER  -