000 00280cam a2200121ua 4500
082 _a621.383
_bBIS/P
100 0 _aBiswas,N.N.
245 0 0 _aPrinciples of telegraphy /
260 _aMumbai:
_bMedia,
_c1996.
300 _ax,185p..
650 0 _aTelegraphy
_aEngineering
942 _cBK
999 _c3984
_d3984