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- SCHULTHEIS, Robert - SUMNER, Mary - BOCK, Douglas. Management information systems : the manager's view. Douglas Bock. 2. ed. Homewood : IRWIN, 1992. 839 s. ISBN 0-256-09366-0. [Copy count : 1, currently available 1, at library only 0]
book
- SUMNER, Mary. Computers : Concepts and Uses. 2. ed. Englewood Cliffs : Prentice-Hall, 1988. 632 s. ISBN 0-13-163446-1. [Copy count : 1, currently available 1, at library only 0]
book