Burt, Cyril. <br/><br/>
The causes and treatment of backwardness / 
Cyril Burt. 
 - 3rd rev. ed. 
 - London :  University of London press,  c 1954. 
 - 128 p. ;  23 cm. 
<br/><br/>Includes bibliographical reference and index. 
<br/><br/>337  337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slow learning children.
<br/><br/><label>Dewey Class. No.: </label>136.7 / B95c