Beck <br/><br/>
AR 8 Multiplication and division of rational numbers  - 
J.William Beck 
 - 1 
 - New York  		  Harper's college press	    1975 
 - 58 
<br/><br/><label>ISBN: </label>061640085					 
<br/><br/><label>Dewey Class. No.: </label>513.2  / BEC