Edwards, Clifford H. <br/><br/>
Teaching elementary school science  a competency-based approach 
Clifford H. Edwards and Robert L. Fisher. 
 - New York  Praeger  1977. 
 - xv, 464 p.  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label> 13.00 
<br/><br/><label>LCCN: </label>75000047  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)