Schonell, Fred J <br/><br/>
Diagnosis of individual difficulties in arithmetic 

 - 2nd ed 
 - Edinburgh  Oliver and Boyd  1942 
 - xi, 115p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ELEMENTARY EDUCATION<br/>MATHEMATICS
<br/><br/><label>Dewey Class. No.: </label>372.74