Martin, David Jerner <br/><br/>
Elementary science methods :  a constructive approach / 
David Jerner Martin 
 - Albany :  Delmar,  1997 
 - 508 p. :  ill. ;  24 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0827371748 
<br/><br/><label>LCCN: </label>95-46332 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (ELementary)--United States<br/>Constructivism (Education)--United States