TY - RPRT TI - Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group: Determination of acetamide herbicides and their degradation products in water using online solid-phase extraction and liquid chromatography/mass spectrometry AU - E.A. Lee AU - A.P. Strahan PY - 2003 DO - 10.3133/ofr03173 UR - https://pubs.usgs.gov/publication/ofr03173 ID - ofr03173 ER -