TY - RPRT TI - Major herbicides in ground water: Results from the National Water-Quality Assessment AU - J.E. Barbash AU - G.P. Thelin AU - D.W. Kolpin AU - R. J. Gilliom PY - 2001 DO - 10.2134/jeq2001.303831x UR - https://pubs.usgs.gov/publication/70023380 ID - 70023380 ER -