O'Daffer,  <br/><br/>
Preálgebra /  
O'Daffer Phares G , Clemens Stanley , Charles Randall  
 - Wilmington :   Addison - Wesley,   1992 
 - 582 p : il 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ALGEBRA<br/>Charles, Randall<br/>Clemens, Stanley
<br/><br/><label>Dewey Class. No.: </label>512 O313