Ferguson J.G. <br/><br/>
Statistical analysis in psychology and education/ 

 - New York  Mc Graw-Hill Book co.  1989 
 - 587p.  .ill 
<br/><br/><label>ISBN: </label>971-11-0657-4 
<br/><br/><label>Dewey Class. No.: </label>519.535 F381