Bilbao, Purita P., <br/><br/>
Teaching Science in the elementary grades :  volume 2: Physics, Earth and space / 
Purita P. Bilbao, [and 2 others]. 
 - viii, 288 pages :  illustrations ;  26 cm.  
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science --Study and teaching Elementary education <br/>Science education <br/>Science teaching 
<br/><br/><label>Dewey Class. No.: </label>372.35  / B49t