Schonell, Fred J <br/><br/>
Diagnosis of individual difficulties in arithmetic / 
Schonell, Fred J 
 -  Oliver & Boyd, London,  1946 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic; Mathematics
<br/><br/><label>Dewey Class. No.: </label>513 SCH-D