Siegel, Sidney. <br/><br/>
Nonparametric statistics for the behavioral sciences / 
Sidney Siegel. 
 - New York :   McGraw-Hill,  c1956 
 - xvii, 312p.  :   ill, graphs, tables ;    24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0070573484 
<br/><br/><label>LC Class. No.: </label>H61  / .S54 1956