References
- Center for Disease Control. Morbidity and Mortality Weekly Report 1986a; 55: 593–608
- Center for Disease Control. Morbidity and Mortality Weekly Report 1986b; 35: 757–765
- Center for Disease Control. Morbidity and Mortality Weekly Report 1987; 56: 801–816
- National Institute On Drug Abuse. NIDA Notes. U.S. Government Printing Office, Washington, DC 1987, DHHS Publ. No. ADM 88–1488
- Schuckit M. A. Drugs and Alcohol Abuse2nd ed. Plenum Press, New York 1984
- Selwyn P. A., Cox C. P., Feiner C, Lipshutz C, Cohen R. L. Knowledge About Aids and High-Risk Behavior Among Intravenous Drug Abusers In New York City. AIDS: A Bimonthly International Journal 1987; 1: 247–254
- Spss Inc. SPSSx User's Guide2nd ed. McGraw-Hill, New York 1986
- Sutker P. B., Allain A. N., Smith C. J., Cohen G. H. Addict Descriptions of Therapeutic Community, Multimodality, and Methadone Maintenance Treat Ment Clients and Staff. Journal of Consulting and Clinical Psychology 1978; 46: 508–517