Larson, Ron,  1941- <br/><br/>
Algebra and trigonometry / 
[by] Roland E. Larson, Robert P. Hostetler ; with the assistance of David E. Heyd. 
 - Lexington, Massachusetts ;   Toronto :   D. C. Heath,  c1985. 
<br/><br/><label>ISBN: </label>0669056448