RT Book T1 Scandinavian drinking survey: demographic variables and representativeness of samples T2 SIFA mimeograph series JF SIFA mimeograph series A1 Hauge, Ragnar A2 Irgens-Jensen, Olav LA English PP Oslo PB National Inst. for Alcohol Research YR 1981 UL https://krimdok.uni-tuebingen.de/Record/109078354X