Siege, Sidney Nonparametric statistics : For the behavioral sciences / by Sidney Siegel - London : Mc Graw-Hill book Co. , 1956 . - 312 p. Hard Back - McGraw-hill series in psychology / edited by Clifford T. Morgan . Subjects--Topical Terms: Statistical testSamplingCorrelation Dewey Class. No.: 519.502 43 / SID-N