00606nam a22001817a 4500 2116 2116 150708b xxu||||| |||| 00| 0 eng d 0471548456 TK 5105 .F577 1993 Fitzgerald,Jerry. Business data communications : basic concepts,security and design/ 4th ed. Newyork: John Wiley & sons, 1993. xxv,722 [52] p.: ill.; 24 cm. Includes index. Data transmission systems. computer netwoks. office practice-automation. lcc BOOKS TK 5105 .F577 1993 0 0 lcc 0 0 MUC MUC GEN 2015-07-08 0 TK 5105 .F577 1993 6102 2022-10-26 2015-07-08 BOOKS