Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group : determination of selected herbicides and their degradation products in water using solid-phase extraction and gas chromatography/mass spectrometry / by J.L. Kish ... [et al.]. [electronic resource]
Imprint
[Lawrence, Kan. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000.]