00397    a2200157   4500041000900000082001800009100002600027245003200053260003200085300002100117504002800138650002500166650001900191650001300210653001600223  aEng.  a510.78bG175L  aGardner, Martin, 194-  aLogic machines and diagrams  aNew YorkbMcGraw Hillc1958  aiv, 152p. illus.  aIncludes bibliographies  aCalculating machines  aReady reckness  aDiagrams  aMathematics