%0 Journal Article %T A system for toxicological screening by capillary gas chromatography with use of a drug retention index based on nitrogen-containing reference compounds. %A Manca,, D %A Ferron,, L %A Weber, J, P %J Clinical Chemistry %V 35 %N 4 %P 601-607 %@ 0009-9147 %D 1989-04-01 %I Oxford Academic %~ DeepDyve