"Sumner,W. L." <br/><br/>
Teaching of arithmetic and elementary mathematics 

 - Oxford  Basil Blackwell  1938 
 - 255p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic study and teaching
<br/><br/><label>Dewey Class. No.: </label>GL 510.07