000 003380000a22001450004500
245 _aModulation theory
100 _aBlack, H.S.
260 _aNew York
_bVan Nostrand
_c1953
300 _a363 p.
440 _aBell Telephone Laboratories series
500 _aplates; diagrams
080 _a621.376
_bB6
041 _aEN
942 _cBK
999 _c94673
_d94673