00319nam a2200121Ia 4500082002100000100002100021245004800042260003500090300001300125490004900138500000500187700000500192  a518.542bH355.CP  aHassitt, Anthony  aComputer programming and computer systemsb  aNew YorkbAcademic Pressc1967  ax, 374p.  aAcademic Press textbooks in Computer Science  a  a