TY  - RPRT
TI  - Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring
AU  - Steven D. Zaugg
AU  - Mark W. Sandstrom
AU  - Steven G. Smith
AU  - Kevin M. Fehlberg
PY  - 1995
DO  - 10.3133/ofr95181
UR  - https://pubs.usgs.gov/publication/ofr95181
ID  - ofr95181
ER  -