000 00299nam a2200133 a 4500
082 _a621.381
_bBET/S
100 _aBetts, J A.
245 _aSignal processing :
_bmodulation and noise /
250 _a1
260 _c1983.
_bE L B S & Oxford uty.,
300 _a0
650 _aPhysics
942 _cBK
999 _c16991
_d16991