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An extended table of critical values for the Mann-Whitney (Wilcoxon) twosample statistic
Milton, Roy C., (1964)
Statistical theory
Lindgren, Bernard W., (1962)
A nonparametric test for relative spread in k unpaired samples
Meyer-Bahlburg, H. F. L., (1970)
Compact table of twelve probability levels of the symmetric binomial cumulative distribution for sample sizes to 1000
MacKinnon, William J., (1959)
Authoritarianism and urban stratification
MacKinnon, William J., (1956)