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999 _c63249
_d63249
005 20201118103251.0
008 190711s9999 xx 000 0 und d
082 _a621.385 D229
100 _aDas, P. N.
245 0 _aIntroduction to Manual Telephony
260 _aCALCUTTA
_bModern Book Agency
_c1978
300 _ap.150
650 _aMANUAL TELEPHONE WORKING
650 _aJUNCTION AND TRUNK WORKING
942 _cSW