TY - RPRT TI - Changes in herbicide concentrations in Midwestern streams in relation to changes in use, 1989-1998 AU - E.A. Scribner AU - W.A. Battaglin AU - D. A. Goolsby AU - E.M. Thurman PY - 2000 DO - 10.1016/s0048-9697(99)00547-1 UR - https://pubs.usgs.gov/publication/70022792 ID - 70022792 ER -