BergD. F.“Extent of Illicit Drug Use: A Compilation of Studies, Surveys and Polls,”Division of Drug Sciences, Bureau of Narcotics and Dangerous Drugs, U. S. Department of Justice, May, 1969.
2.
BrillL.“Treatment of Drug Abuse”published by American Social Health Association, New York, 1972.
3.
ChambersC. D.An Assessment of Drug Use in the General Population, Special Report No. 1, New York State Narcotic Addiction Control Commission, May, 1971.
4.
SmartR. G.“Illicit Drug Use in Canada: A Review of Current Epidemiology with Clues for Prevention.”The International Journal of the Addictions, September, 1971.