000 00309pam a2200133 a 4500
020 _c
041 _h
082 _a5.5
100 _aFREER (John R)
_eauthor
245 _aComputer Communications and Networks
_hTextual Document
260 _bSigma Press New Delhi
_c1990
300 _ax, 431
930 _a1710
999 _c820924
_d820924