Gelʹfand, I. M. <br/><br/>
Trigonometry / 
I. M. Gelʹfand & Mark E. Saul. 
 - Boston :  Birkhäuser,  c2001. 
 - x, 229 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0817639144 (alk. paper) 9780817639143 (alk. paper) 
<br/><br/><label>LCCN: </label>99032245  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry.
<br/><br/><label>LC Class. No.: </label>QA533  / .G45 2001 
<br/><br/><label>Dewey Class. No.: </label>516.24/2