TY  - RPRT
TI  - The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the midwestern United States
AU  - E.M. Thurman
AU  - J. D. Fallon
PY  - 1996
UR  - https://pubs.usgs.gov/publication/70018587
ID  - 70018587
ER  -