20 1 50 William Stallings Additional Author Lawrie Brown Additional Author mixed material 9780133773927 America PEARSON 2015 David Reed Additional Author mixed material 9780131358294 Pearson Prentice Hall 2008 V. Carl Hamachek Additional Author Zvano G. Vranesik Additional Author mixed material Mc Graw Hill 1990 Gio Wicderhald Additional Author mixed material Internal Student Edition 1983 Gilbert Held Additional Author Thomas R. Marshall Additional Author mixed material John Wiley & Sons 1987 Edward M Reingold Additional Author Wilfred J. Hansen Additional Author mixed material Little Brown 1983 Robert L. Krause Additional Author mixed material Prentice Hall 1989 Raoy S. Ellzey Additional Author mixed material Science Research Associates 1982 Wayne Ams Bury Additional Author mixed material Wads Worth Pub 1985 Roy S. Ellzey Additional Author mixed material Macmillan Pub 1989 Vijay Ahuja Additional Author mixed material McGraw Hill 1985 Vijaj Athuja Additional Author mixed material McGraw Hill 1985 Gio Wiederhold Additional Author mixed material McGraw Hill 1987 Paul Helman Additional Author Robert Veroff Additional Author mixed material Benjamin (Cumming) 1988 Clive L. Dym Additional Author Raymond E. Levitt Additional Author mixed material McGraw Hill 1991 W.R. Tunnicliffe Additional Author mixed material Prentice Hall 1991 David W. Roiston Additional Author mixed material McGraw Hill 1988 Scymour Lipschutz Additional Author mixed material Mc Graw Hill 1986 Francis Scheid Additional Author mixed material McGraw Hill 1983 Robert H Dunn Additional Author mixed material Mc Graw Hill 1984