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2. Altbach, P. (1974). Student Politics in America: A Historical Analysis. New York: McGraw-Hill.
3. Astin, A., et al. (1975). The Power of Protest. San Francisco: Jossey Bass.
4. Astin, A., Astin, H. S., Bayer, A. E. and Bisconti, A. S. (1975). The Power of Protest. San Francisco: Jossey Bass.
5. Lipset, S. M. (1976). Rebellion in the University. Chicago: University of Chicago Press.