Perera, H.S. <br/><br/>
The science of intelligence tests 
<label>/ by </label> Perera, H.S. 
 - Colombo  The City Press, Printer  1944 
 - viii,80p.  ill.  22cm. 
<br/><br/>L 
<br/><br/><label>Dewey Class. No.: </label>151.222  / P