Schonell, F. J. <br/><br/>
Backwardness in the basic subjects / 
by Fred J. Schonell. 
 - 4th ed. 
 - Edinburgh :  Toronto :  Oliver and Boyd ;  Clarke, Irwin,  1948 [Reprinted 1952] 
 - xix,566 p. :  ill. ;  23 cm. 
<br/><br/>Bibliographical footnotes. and Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Remedial teaching.<br/>Exceptional children.
<br/><br/><label>Dewey Class. No.: </label>136.7  / SCB 1952