512/.13 <br/>

   Keedy, Mervin Laverne.<br/>
                  Algebra and trigonometry / 
Mervin L. Keedy, Marvin L. Bittinger, Judith A. Beecher. 
 - 6th ed. 
 - Reading, Mass. :  Addison-Wesley,  c1993. 
 - 1 v. (various pagings) :  ill. (some col.) ;  28 cm. -
<br/><br/> Includes index. 
<br/><br/>                 <label>ISBN: </label>0201525178 
<br/><br/><label>LCCN: </label>92044348  
<br/><br/>                 <label>Түлхүүр үг: </label>Algebra., Trigonometry., 
<br/><br/><label>LC Class. No.: </label>QA154.2  / .K43 1993