Banks, A.S. and R.B. Textor (1963) A Cross-Polity Survey. Cambridge : MIT Press.
2.
Caplow, T. and K. Finsterbusch (1964) "A matrix of modernization ." Delivered to meetings of the American Sociological Association (mimeo).
3.
Cutright, P. (1963) "National political development: social and economic correlates," in N. W. Polsby, R. A. Dentler, and P. A. Smith (eds.) Politics and Social Life. Boston: Houghton-Mifflin.
4.
Fogelman, E. (1968) Manual for the Comparative Politics Laboratory: Conditions for Effective Democracy. Department of Political Science, University of Minnesota.
5.
Lerner, D. (1958) The Passing of Traditional Society. Glencoe, Ill.: Free Press.
6.
Lipset, S.M. (1959) "Some social requisites of democracy: economic development and political legitimacy." Amer. Pol. Sci. Rev.53 (March).
7.
Mahalanobis, P.C. (1936) "On the generalized distance in statistics." Proceedings of the National Institute of Science of India, Vol. 2.
8.
Rao, C.R. (1954) "On the use and interpretation of distance functions in statistics." Bull. of the Institute of International Statistics34.
9.
——— (1952) Advanced Statistical Methods in Biometric Research . New York: John Wiley.
