000 00289nam a2200121Ia 4500
008 160710s1970 xx 000 0 und d
082 _a621.3815 WEL
100 _aWELS, B.
245 _aCOMPUTER CIRCUITS AND HOW THEY WORK
260 _bTAB BOOKS
_c1970
300 _a188
942 _2ddc
_cB
999 _c44874
_d44874