Jensen, Rosalie <br/><br/>
Exploring mathematical concepts and skills in the elementary school / 
Rosalie Jensen 
 - Columbus, Ohio :  Charles E. Merrill,  1973 
 - xii, 558 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0675090296 
<br/><br/><label>LCCN: </label>72-091083 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)