LEADER 00000nam 2200205 a 4500 001 1014406 003 UkHlHU 007 t 008 000707 4 1990 000 eng 020 0434907006 040 UkHlHU 050 4 TK 5105.5 G1 100 0 Gandoff, Martin. 245 00 Students' guide to data communications. 260 Oxford :|bHeinemann Newnes,|c1990. 300 459p. 440 0 Heinemann Newnes informatics series 946 6XX absent
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