00435nam a2200145Ia 450000100060000000300050000600500170001100800410002801000150006910000260008424500510011026000500016130000270021165000510023890311BIBL20160527204643.0711119s1970    xx            000 0 eng u  a 77133799 10aWels, Byron G.2Local10aComputer circuits & how they workcByron Wels.0 aBlue Ridge Summit, Pa.,bG/L Tab Booksc1970.  a188 p.billus.c22 cm. 0aElectronic digital computersxCircuits.2Local