Aufmann, Richard N. <br/><br/>
College trigonometry 
Richard N. Aufmann, Vermon C. Barker, Richard D. Nation 
 - Second edition.  
 - U.S.A  Houghton Mifflin Company  1993 
 - xvii, 346 pages,   illustrations  26 cm 
<br/><br/> includes Appendix and index 
<br/><br/><label>ISBN: </label>0395638135