References
- Bailey W. C. Primary Drug Addiction. Medical Opinion and Review July, 1967; 83
- Blum R. H. Students and Drugs. Jossey–Bass, Inc, San Francisco 1969; Vol. 11: 3–17
- Keniston K. Heads and Seekers, Drugs on Campus, Counter Cultures and American Society. Mental Health Digest May, 1969; 1(5)8