Calculating Instruments and Machines, 1949 first edition.
Univ Illinois Press, Urbana, 1949; first edition;.
Univ Illinois Press, Urbana, 1949; first edition;.
The National Research Council, Wash., D.C., 1950, pp 181-259 inclusive.
American Telephone & Telegraph, NY 1932; complete separate January issue; 196 pages.
American Telephone & Telegraph, July 1950; pp 295-468; illus, photos, references; light blue paper wraps.
AT&T, NY 1959, 1,603 pages plus index at rear; also bound-in are contents of monographs; diagrams, photographs, references.