TY - RPRT TI - Coupling solid-phase extraction and enzyme-linked immunosorbent assay for ultratrace determination of herbicides in pristine water AU - D.S. Aga AU - E.M. Thurman PY - 2002 DO - 10.1021/ac00068a029 UR - https://pubs.usgs.gov/publication/70017464 ID - 70017464 ER -