000 00299nam a2200121Ia 4500
001 123451
008 170722s9999 xx 000 0 und d
100 _aLathi, Bp
245 _aCommunication systems /
260 _aNew Delhi :
_bWiley Entery limited ,
_c1972.
300 _aPpix+431
942 _cGEN
999 _c106611
_d106611