McKeague, P. Charles <br/><br/>
An electronic companion to precalculus/ 
Charles P. McKeague Patrick C. Mckeague and Denny Burzynski 
 - New York :  Cogito Learning Media Inc.  c1998. 
 - vii,310p. :  ill. ;  23 cm.+disk 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>1580320015 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra--Study and teaching.<br/>Algegra--Computer assisted instruction.<br/>Trigonometry--Study and teaching.<br/>Trigonometry--Computer assisted instruction.