Elementary functions: backdrop for the calculus [by] Melcher P. Fobes. Backdrop for the calculus. Fobes, Melcher P. Functions. QA331.3 .F62 1973 515.16 F651c "Preliminary edition, entitled Backdrop for the calculus, with the elementary functions, copyright c1970." New York, Macmillan 1973 1973 1973 Text xv, 510 p. eng