How to use adding and calculating machines
Subtitle: ten-key, full-key, rotary, key-driven
By: [by] Arthur L. Walker, J. Kenneth Roach [and] J. Marshall Hanna.
Publisher: Gregg Pub. Division, McGraw-Hill
Published: 1953
Place of publication: New York
Language: eng
Number of pages: 250
Subjects: Calculators.