How to use crank-driven calculators
By: a twenty-unit course by Albert Stern and Mary Stuart.
Contributors: Stuart, Mary, joint author.
Publisher: The Gregg publishing company
Published: 1942
Place of publication: New York; Chicago [etc.]
Language: eng
Number of pages: 92
Subjects: Calculators.
Notes: "Companion volume, How to use the calculator and the comptometer."--Pref.