1. Bednar, R. and G. Lawlis (1971) "Empirical research in group psychotherapy," pp. 812-838 in A. Bergin and S. Garfield (eds.) Handbook of Psychotherapy and Behavior Change. New York: John Wiley.
2. Brief Communications
3. Gazda, G. and R. Peters (1973) "Analysis of research in group procedures." Educational Technology (Special Issue: Group counseling: Part One; January): 68-75.
4. Gibb, J. (1971) "The effects of human relations training," pp. 839-862 in A. Bergin and S. Garfield (eds.) Handbook of Psychotherapy and Behavior Change. New York: John Wiley.
5. Hill, W. (1973) "Hill interaction matrix (HIM): conceptual framework for understanding groups," pp. 159-176 in J. Jones and J. Pfeiffer (eds.) The 1973 Annual Handbook for Group Facilitators. San Diego: University Associates.