TY - RPRT TI - Occurrence of acetochlor and acetochlor metabolites in alluvial aquifers in Iowa AU - Stephen J. Kalkhoff AU - Mark E. Savoca AU - Eric M. Sadorf AU - Dana W. Kolpin AU - Earl M. Thurman PY - 1999 UR - https://pubs.usgs.gov/publication/70169927 ID - 70169927 ER -