00415pamaa2200145 4500 0000022723 20100420090000.0 0471162671 (pbk) 005.12 MAN QA76.9.U83 MAN 1997 MANDEL The elements of user interface design Theo Mandel. New York: John Wiley, 1997. xvi, 440p.: ill.; 24cm. User interfaces (Computer systems)