This is a vintage paperback book, Simplifying the Slide Rule by Robert W. Marks,  Introducing the Unifact Method.  "The easiest and most effective way yet devised for learning the slide rule. 

Fair condition.  Discoloration of the pages due to age and brittle paper. Also a fold on the back cover.  See the pictures

Publisher: Bantam Books, New York, Toronto, London

139 pages

Paperback

7 x 4.25 x 0.5 inches

Weight ounces

SKU AB-0-07-24-031

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