Blough, Glenn Orlando. <br/><br/>
Elementary school science and how to teach it 
by Glenn O. Blough and Julius Schwartz. 
 - 5th ed. 
 - New York  Holt, Rinehart and Winston  1974. 
 - xviii, 532 p.  ill. 
<br/><br/><label>ISBN: </label>0030915392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)
<br/><br/><label>LC Class. No.: </label>LB1585.3  / .B55 1974 
<br/><br/><label>Dewey Class. No.: </label>372.3/5