000 00286nam a2200121Ia 4500
008 170101s1953 xx 000 0 und d
082 _a621.313 2 M76D
100 _aMORECOCK, E. M
245 0 _aDirect - current circuits
250 _a2nd ed.
260 _bN.Y.
_c1953
942 _2ddc
_cB
999 _c13538
_d13538