IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual -- Test Control Panel, accounting machine Type 402.
IBM NY 1951, 27 pages, double-column text, illustrations and diagrams throughout.
IBM NY 1951, 27 pages, double-column text, illustrations and diagrams throughout.
Systems and Procedures Assoc, Cleveland OH 1966; approx. 320 pages indiv. Sections paginated; Index.