[14] Bogardus: American Journal of Sociology, May 1924, p. 703.

[15] Lindeman: Social Discovery, p. 44.

[16] Lindeman: Social Discovery, p. 120.

[17] Davis: Psychological Interpretations of Society, p. 9.

[18] Cited in Elwood, p. 330.

[19] Ellwood, p. 330.

[20] Baldwin, p. 571.

[21] Lindeman, p. 136.

[22] Dennes: Method and Presuppositions of Group Psychology, p. 145.

[23] MacDougall: Group Mind, p. 12.