Author: Boardman, H.
Title: Supplement to the P. I. C. book of general instructions introducing the use of the P. I. C. differential scales for trigonometrical computations.
Description: np, P. I. C. Slide Rules, nd. 20 pp. soft cover. Sdescription VG. Light soiling and shelf wear to covers, light soiling to page edges, overall very good condition. No Jacket.

Keywords: P. I. C. differential scales for trigonometrical computations, trinometry


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