TY - RPRT TI - Evaluating changes in matrix based, recovery-adjusted concentrations in paired data for pesticides in groundwater AU - Tammy M. Zimmerman AU - Kevin J. Breen PY - 2012 DO - 10.2134/jeq2011.0271 UR - https://pubs.usgs.gov/publication/70006298 ID - 70006298 ER -