TY - RPRT TI - Update of Watershed Regressions for Pesticides (WARP) for Predicting Atrazine Concentration in Streams AU - Wesley W. Stone AU - Robert J. Gilliom PY - 2009 DO - 10.3133/ofr20091122 UR - https://pubs.usgs.gov/publication/ofr20091122 ID - ofr20091122 ER -