Washton, Nathan Seymour  1916- <br/><br/>
Teaching science in elementary and middle schools / 
Nathan S. Washton. 
 - New York:   McKay,   1974.  
 - xxvi, 482 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>067930231X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)
<br/><br/><label>Dewey Class. No.: </label>372.35