Branley, Franklyn M.. <br/><br/>
The physical world / 
Franklyn M. Branley, Milton O. Pella, John Urban. 
 - Boston :  Ginn and Company,  1965. 
 - 264 pages :  illustrations ;   24 cm. 
 - Science horizons .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching.