Hartung, Maurice Leslie,    1902- <br/><br/>
Seeing through arithmetic. 

 - Chicago :    Scott, Foresman,    1963. 
 - 4 v.:    col. ill. ;    24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Arithmetic -- Study and teaching (Elementary)
<br/><br/><label>Dewey Class. No.: </label>TR 511