000 00290nam a2200121Ia 4500
008 220201s1957 xx 000 0 eng d
082 _a621.381
_bRYD
100 _aRyder, John D
245 0 _aEngineering electronic
260 _aNew yourk
_bMcgrawhill
_c1957
300 _a667
942 _2ddc
999 _c14453
_d14453