RT Article T1 The epidemiology of cocaine and opiate abuse in urban Canada JF Canadian journal of public health VO 89 IS 4 SP 234 OP 238 A2 Boivin, Denis A2 Kennedy, Dave A2 Rinehart, Joseph A2 Fralick, Pamela A2 Whynot, Elizabeth M. LA English YR 1998 UL https://krimdok.uni-tuebingen.de/Record/163979333X K1 Drogenmissbrauch K1 Kokainkonsum K1 Kanada