RT Article T1 Scale-up methods as applied to estimates of heroin use JF Journal of drug issues VO 36 IS 2 SP 417 OP 432 A1 Kadushin, Charles A1 Beveridge, Andrew A. A1 Bernard, H.R. A1 Killworth, Peter D. A2 Beveridge, Andrew A. A2 Bernard, H.R. A2 Killworth, Peter D. LA English YR 2006 UL https://krimdok.uni-tuebingen.de/Record/1912695294 DO 10.1177/002204260603600209