Page, David A. <br/><br/>
Number lines, functions, and fundamental topics :  mathematics for elementary school teachers / 
David A. Page. 
 - New York :  Macmillan,  c1964. 
 - ix, 283 p. : ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching (Elementary).<br/>Number line.