graphs & models Bittinger, Marvin L. Beecher, Judith A. Ellenbogen, David. Penna, Judith A. text Boston Addison Wesley Longman Inc. c2001 2nd ed. monographic xviii,772 p. ; 26 cm. Marvin L. Bittinger [and three others]. Includes appendix and indices. Algebra--Graphic methods Trigonometry--Graphic methods 512.13 A394 2001 0-201-61673-4