Morton, Robert Lee <br/><br/>
Teaching children arithmetic  primary, intermediate, upper grades 
Robert Lee Morton. 
 - New York  Silvert Burdett  [1953] 
 - 566 p.  ill. 
<br/><br/> Includes indexes. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching.