000 00304nam a2200121Ia 4500
008 220201s1993 xx 000 0 eng d
082 _a621.3815
_bBER
100 _aBerpar, Keith & Beevor, Ptent
245 0 _aComputer Communicaion
260 _aLondon
_bMcGraw Hill
_c1993
300 _a224
942 _2ddc
999 _c26981
_d26981