1. BENNE, K. D., and SHEATS, P."Functional Roles of Group Members."J. Soc. Issues, Vol. IV, 2, 41-50.
2.
2. DEUTSCH, M." A Theory of Co-operation and Competition."Human Relations, Vol. II, 2.
3.
3. DEUTSCH, M." Task Structure and Group Process." In preparation.
4.
4. FESTINGER, L." The Role of Group Belongingness in a Voting Situation."Human Relations, Vol. 1, 2, 154-180.
5.
5. FRENCH, J. R. P." Organized and Unorganized Groups Under Fear and Frustration."Studies on Topological and Vector Psychology III, Univ. Ia. Stud. Child Welf., 20-20.
6.
6. KENDALL, M. G.Advanced Theory of Statistics. Vol. II, C. Griffin & Co., 1946.
7.
7. LIPPITT, R." An Experimental Study of the Effect of Democratic and Authoritarian Group Atmospheres."Studies in Topological and Vector PsychologyI, Univ. Ia. Stud. Child Welf., 16, No. 3.
8.
8. MURPHY, MURPHY, and NEWCOMB. Experimental Social Psychology. Harpers, 1937.
9.
9. SNEDECOR, G. W.Statistical Methods. Collegiate Press, 1946.