Ballard, Stanley <br/><br/>
Physics principles 

 -  530 BAL  1970 
 - 757 
<br/><br/><label>Standard No.: </label>75355 
<br/><br/><label>Subjects--Index Terms: </label>Physics Physics 
<br/><br/><label>Dewey Class. No.: </label>530  / BAL