TY  - RPRT
TI  - Selected papers on agricultural chemicals in water resources of the Midcontinental United States
AU  - D. A. Goolsby
AU  - L.L. Boyer
AU  - G. E. Mallard
PY  - 1993
DO  - 10.3133/ofr93418
UR  - https://pubs.usgs.gov/publication/ofr93418
ID  - ofr93418
ER  -