Schonell, F. J. <br/><br/>
Backwardness in the basic subjects / 
by Fred J. Schonell. 
 - 4th ed. 
 - Edinburgh:   Oliver and Boyd,   1965.  
 - xix, 566 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Exceptional children<br/>Remedial teaching
<br/><br/><label>Dewey Class. No.: </label>371.9