Frideres, J. S., Warner, L. G., and Albrecht, S. L., The impact of social constraints on the relationship between attitudes and behavior. Social Forces, 1971, 50, 102-112.
2.
Gray, L. N., and Warner, L. G.Statistical measures of association. Manuscript in prepartion, 1973.
3.
Hays, W. L.Statistics. New York: Holt, Rinehart, and Winston, 1963.
4.
Kruskal, W. H.Ordinal measures of association . Journal of the American Statistical Association, 195853, 815-861.
