a functions and graphs a graphing approach and precalculus with limits : a graphing approach Edwards, Bruce H. creator Zook, Dianna L. text Lexington D. C. Heath and Company c1994 monographic v, 511 p. : ill. Bruce H. Edwards, Dianna L. Zook Precalculus Mathematics QA303.I57 .E3 1994 0669352071 UOEL 000 20150421155107.0