References
- Anderson T. Introduction to Multivariate Statistical Analysis. Wiley, New York 1958
- McAree, Steffenhagen, Zheutlin. Personality factors in college drug users. Intern. J. Soc. Psychiat. 1969; 15: 102–106
- Segal B., Feger G. Drug use and fantasy processes in college students. Altered States of Consciousness, 1, In press