Siegel, Sidney, 1916-1961. Nonparametric statistics for the behavioral science / Sidney,Siegel, - New York, McGraw-Hill, 1956. - 312 p. illus. 24 cm. - McGraw-Hill series in psychology . LCCN: 56008185 Subjects--Topical Terms: Experimental design.Social sciences--Research.Nonparametric statistics. Dewey Class. No.: 310 / SIN 1956