World Health Organization. Expert Committee on Addiction-Producing DrugsWorld Health Organization2012-06-162012-06-1619571957-12-319241201169https://iris.who.int/handle/10665/4037115 p.enSubstance-Related DisordersExpert Committee on Addiction-Producing Drugs [meeting held in Geneva from 18 to 24 October 1956] : seventh report