00274nam a2200109Ia 4500008004100000041000800041082001600049100001600065245003900081260003600120300000800156211209s1978    xx            000 0 und d  aeng  a004 N78 SPE  aSPENCER D D  aFUNDAMENTALS OF DIGITAL COMPUTERS   bHOWARD W SAMS AND COMPANYc1978  a320