000 003430000a22001330004500
008 140223b1974 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aD66,4 L4
082 _aD66,4 L4
100 _aHancock (J C)
245 _aInteroduction to the principle of communications theory
260 _c1974
650 _aEleectron Engineering
999 _c155256
_d155256