Gega, Peter C.,  1924- <br/><br/>
Science in elementary education / 
Peter C. Gega. 
 - 4th ed. 
 - New York :  John Wiley & Sons,  1982. 
 - xvii, 600 p. :  ill. ;  26 cm. 
<br/><br/>Bibliography : p. 581-584 
<br/><br/><label>ISBN: </label>0471096784 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary).