000 00326nam a2200121Ia 4500
008 220120s9999||||xx |||||||||||||| ||und||
082 _a621.382 ALI
100 _aAli, Syed, R
245 0 _aDigital switching sy ems
260 _aMcgraw hill book company
_bDhavanagere
_c2011
300 _aVI, 330p.
_b210
650 _aMECHANICAL
999 _c132849
_d132849