000 00246nam a2200097Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aJOLLEY (EH)
245 0 _aINTRODUCTION TO TELEPHONY & TELEGRAPHY
260 _bWHEELER PUB. DELHI
942 _2ddc
999 _c95631
_d95631