Lial, Margaret L. <br/><br/>Trigonometry 6th ed.  -- Reading, MA  Addison-Wesley  1977 <br/>xxiv, 422p.  24cm. <br/><br/> Includes index <br/><br/><label>ISBN: </label>0673995534 <br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry<br/><br/><label>Dewey Class. No.: </label>GC 516.24 L613 1997