00278nam a2200109Ia 4500008004100000041000800041082002200049100001600071245002800087260004500115300000800160211209s1970    xx            000 0 und d  aeng  a621.3 N70 HAM/GEH  aHAMMOND S B  aELECTRICAL ENGINEERING   aNEW YORKbMCGRAW-HILL BOOK COMPANYc1970  a554