Vernon P.E. <br/><br/>
Intelligence and attainment tests 

 - London  University of London Press UK     1960 
<br/><br/><label>Standard No.: </label>235,281 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>T:871, K0;1