TY  - RPRT
TI  - Determination of herbicides and their degradation products in surface waters by gas chromatography/positive chemical ionization/tandem mass spectrometry
AU  - C.E. Rostad
AU  - W. E. Pereira
AU  - T.J. Leiker
PY  - 1989
DO  - 10.1002/bms.1200180928
UR  - https://pubs.usgs.gov/publication/70016443
ID  - 70016443
ER  -