//-->
Statistical methods for categorical data analysis
Powers, Daniel A., (2000)
Introduction to statistics : a nonparametric approach for the social sciences
Leach, Chris, (1979)
Statistical power analysis for the behavioral sciences
Cohen, Jacob, (1969)
Family characteristics of homewners
Cohen, Lillian, (1950)
The National Labor Relations Board in retrospect.
Cohen, Julius, (1948)