Supplement to the manual on training of statistica 

 - New York  United Nation U S A       1964 
 - v,246p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Specific Group Education
<br/><br/><label>Dewey Class. No.: </label>T9(B28):3g, K4