The new explaining why / 
Thomas I. Dowling ...[et al.]. 
 - Teachers ed. 
 - Philadelphia :   John C. Winston,   c 1957. 
 - Vols. :  ill. ;  23 cm. 
 - Understanding science.  .
<br/><br/>V. 4-- ;  
<br/><br/>327  327 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reading and use of other information media.<br/>Science -- Study and teaching (Elementary).
<br/><br/><label>Dewey Class. No.: </label>028.5 / D756n