Protocol amending the Single Convention on Narcotic Drugs, 1961
The development of drug-taking among secondary school children in the Netherlands
Young drug users: sociological study of one sample
The patterns of drug abuse among school children
A study of the conscious motivations and the effects of marihuana smoking on a group of adolescents in Chile
Total analysis of an illicit or "street" narcotic sample by thin-layer chromatography
Drug abuse in El Salvador
Regulations for the control of narcotic drugs in Czechoslovakia