Punched card tabulators.- Eckert (Wallace) Punched card methods in scientific computation, Columbia University, 1940; and 8 others on the same (9)

Punched card tabulators.- Eckert (Wallace) Punched card methods in scientific computation, first edition, diagrams and illustrations, original cloth, Columbia University, 1940 § Friedman (Burton D.) Punched card primer, Department of the Interior library stamps (and Withdrawn stamps), original boards, extremities rubbed, New York, Public Administration Service, 1955 § Casey (Robert S.) and James W. Perry. Punched cards: their applications to science and industry, second printing, original cloth, New York, Reinhold Publishing Corporation, 1951, [Tomash & Williams E1, F99 & C34]; and 6 others on the same, 8vo (9)