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024 _a32521
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aD65,8(B):(P), M8
100 _aFreer J R
245 0 _aComputer communication and networks
260 _aLondon
_bPitman
_c1988
300 _a432p.
_ccm.
942 _hD65,8(B):(P), M8
_cTEXL
_2CC
999 _c70455
_d70455