STUDIES in arithmetic / 

 - London  University of London  1941 
 - xxvi, 218 p. 
<br/><br/><label>ISBN: </label>72352 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education
<br/><br/><label>Dewey Class. No.: </label>371.35  / STU