Leach,Chris <br/><br/>
Introduction to statistics  a Nonparametric Approach for the social sciences 
Chris Leah 
 - New York  John Wiley & Sons  1979 
 - xiii, 339p. 
<br/><br/> incl. ref. 
<br/><br/><label>ISBN: </label>0471997420 
<br/><br/><label>LC Class. No.: </label>HA 29  / .L32 1979