Mechanical aids to computation
By: by J.J. Del Grande, J.C. Egsgard, H.A. Mulligan
Contributors: Egsgard, J. C., 1925-; Mulligan, H. A.
Publisher: W.J. Gage
Published: 1969
Place of publication: Toronto
Language: eng
Number of pages: 58
Subjects: Mathematical instruments; Slide-rule
Notes: Authorized: 1970-1976.

Intermediate Division.

OTC