Conover, W. J <br/><br/>
Practical nonparametric statistics 

 - 2nd.ed 
 - New York  John Wiley and Sons  1971(1980) 
 - xiv, 493p 
<br/><br/><label>ISBN: </label>0471084573 
<br/><br/><label>LC Class. No.: </label>QA 278.8 Con