00312nam a2200145Ia 450000500170000002000090001708200080002610000200003424500300005425000060008426000530009030000080014350000090015165000060016020250827091925.0  aNULL  a160  aGardner, Martin 0aLogic Machines & Diagrams  a-  aNew YorkbMcGraw Hill International Book Company  a157  a1404  a-