Thier, Herbert D. <br/><br/>
Teaching elementary school science  a laboratory approach 
[by] Herbert D. Thier. 
 - Lexington, Mass.  Heath  [1970] 
 - vii, 273 p.  illus. 
<br/><br/> 920901 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>74107386  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)