000			00551 a2200205 4500
003			ISURa
008			150206b xxu||||| |||| 00| 0 eng d
020			_a0201565064
041			_aEnglish
082			_a004.6 _bHAL
100			_aHalsall , Fred
245			_aData communications computer networks and open systems
250			_a3rd ed.
260			_c1992 _aWokingham _bAddison-Wesley
300			_bill. _c24 cm. _axi ,772 p.
650			_aCOMPUTER SCIENCE
650			_aCOMPUTER COMMUNICATION
650			_aCOMPUTER NETWORKS
942			_cLN _2ddc
999			_c40246 _d41793