The new discovering why / 
Thomas I. Dowling...[et. al.]. 
 - Philadelphia :  The John C. Winston,  c 1958. 
 - 348 p. :  ill. ;  24 cm. 
<br/><br/>0   0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science -- Study and teaching.
<br/><br/><label>Dewey Class. No.: </label>910 / D756n