Letter: Comparative merits of techniques for barbiturate detection in urine.
D001463:Barbiturates / Q000652:urine*; D002849:Chromatography, Gas / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D006801:Humans; D011863:Radioimmunoassay / Q000379:methods
D001463:Barbiturates