000 00305nam a2200109Ia 4500
008 240109s9999 xx 000 0 und d
041 _aeng
100 _aWilliam A.Shay
245 _aUnderstanding Data Communications & Networks
260 _bVikas Pubs. House Pvt ltd ,New Delhi
650 _aManagement
999 _c1023502
_d1023502