TY  - RPRT
TI  - Temporal trends of selected agricultural chemicals in Iowa's groundwater, 1982-1995: Are things getting better?
AU  - D.W. Kolpin
AU  - D. Sneck-Fahrer
AU  - G.R. Hallberg
AU  - R.D. Libra
PY  - 1997
DO  - 10.2134/jeq1997.00472425002600040012x
UR  - https://pubs.usgs.gov/publication/70019851
ID  - 70019851
ER  -