Blough, O. Glenn <br/><br/>
Elementary school science and how to teach it / 
Glenn O. Blough and Julius Schwarts 
 - 4th ed. 
 - New York :  Holt, Rinehart and Winston,  1951 
 - 810 p. :  ill, photo ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>030698901 :  USD 10.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)
<br/><br/><label>Dewey Class. No.: </label>372.3