RT Article T1 Heroin availability and aggregate levels of use: secular trends in an urban black cohort JF American journal of drug and alcohol abuse VO 13 IS 1-2 SP 109 OP 134 A1 Messeri, Peter A. A2 Brunswick, Ann F. LA English YR 1987 UL https://krimdok.uni-tuebingen.de/Record/1636888879 K1 Heroinabhängigkeit