Downing, Douglas <br/><br/>
Trigonometry the easy way  

 - New  York  Barron's Educational Series   1984 
 - xii, 257 p. 
<br/><br/><label>ISBN: </label>0812027175 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>516.24  / D58