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Sudjai Nantarat. (1998) Determination of amphetamine, methamphetamine and ephedrine in urine by gas chromatography-mas spectrometry . Chiang Mai University/Chiang Mai.
Sudjai Nantarat. Determination of amphetamine, methamphetamine and ephedrine in urine by gas chromatography-mas spectrometry. . Chiang Mai:Chiang Mai University, 1998.
Sudjai Nantarat. (1998) Determination of amphetamine, methamphetamine and ephedrine in urine by gas chromatography-mas spectrometry . Chiang Mai University/Chiang Mai.