1. Carnegie Commission on Higher Education (1971).New Students and New Places: A Report. New York: McGraw-Hill.
2. Christaller, W. (1933).Die Zentralen Orte in Süddeutschland ... Jena; also (1966).Central Places in Southern Germany. (trans. Baskin, C. W.). Englewood Cliffs, New Jersey: Prentice-Hall. [Christaller's theories as developed in economic and geographic thought have been reviewed by Berry, B. J. L., and Pred, A. (1961/1965).Central Place Studies. Philadelphia: Regional Science Institute.]
3. Gossman, C. S. (1967).Migration of College and University Students: State of Washington. Seattle: Washington State Census Borad.
4. Jencks, W., and Riesman, D. (1968).The Academic Revolution. New York: Doubleday.
5. Kariel, H. G. (1968). “Student Enrollment and Spatial Interaction.”Annals of Regional Science, 2:2