Billstein, Rick <br/><br/>
A problem solving approach to mathematics for elementary school teachers / 
Rick Billstein, Shlomo Libeskind, Johnny W. Lott 
 - 4th ed. 
 - Menlo Park, Calif. :  Benjamin/Cummings Pub. Co.,  1990 
 - 945 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical refrences and index 
<br/><br/><label>ISBN: </label>0805303901 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)<br/>Mathematics--1961-<br/>Problem solving