Schonell, Fred. J., <br/><br/>
Backwardness in the Basic Subjects /  Textual Documents 
Fred. J. Schonell. 
 - 4th ed. / 
 - London :  Oliver & Boyd ,  1948. 
 - xix, 566p. :  ill. ;  22cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Education MS-Edu 
<br/><br/><label>Dewey Class. No.: </label>371.92