TY - SER AU - Yonamine,Mauricio TI - Solid-phase micro-extraction-gas chromatography -mas spectrometry and headspace-gas chromatography of tetrahydrocannabinol amphetamine, methamphetamine, cocaine and ethanol in saliva samples Sources - Journal of Chromatography B. Sources - 789 (1) 2003 : 73-78 ISSN - 1570-0232 ER -