Quattro for the professional / Elna R. Tymes, with Charles E. Prael. Tymes, Elna. Prael, Charles E. jt. aut. Electronic spreadsheets. Business Computer programs. HF5548.4.Q38 T96 1988 005.369 19 TYQ Includes index. Blue Ridge Summit, PA : Tab Books, c1988. c1988. 1988 Text xi, 307 p. : eng