1. 1. Report of the National Commission on Marijuana and Drug Abuse. Mar 1972, pp 34-36.
2. 2. Toohey JV : An analysis of drug use behavior at five American universities. Alcohol and Drugs Quo Vadis, Research Report by Arizona Academy Oct 1971, p 58.
3. 3. Byrd OE : Medical Readings on Drug Abuse, p 117.
4. The state of the union, the president's message to congress;Presidential Documents