TY  - RPRT
TI  - Method of analysis and quality-assurance practices by the U. S. Geological Survey Organic Geochemistry Research Group—Determination of four selected mosquito insecticides and a synergist in water using liquid-liquid extraction and gas chromatography/mass spectrometry
AU  - L.R. Zimmerman
AU  - A.P. Strahan
AU  - E.M. Thurman
PY  - 2001
DO  - 10.3133/ofr01273
UR  - https://pubs.usgs.gov/publication/ofr01273
ID  - ofr01273
ER  -