TY  - RPRT
TI  - Assessing groundwater vulnerability to agrichemical contamination in the Midwest US
AU  - M. R. Burkart
AU  - D.W. Kolpin
AU  - D.E. James
PY  - 1999
DO  - 10.1016/s0273-1223(99)00042-6
UR  - https://pubs.usgs.gov/publication/70021759
ID  - 70021759
ER  -