K&E Pamphlet "How to Choose a Slide Rule"
2nd edition by Don Herold
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This pamphlet was published by K&E as an info-mercial for the 4081 and 4080 Log Log Duplex slide rules. This 2nd edition was published in 1956. This edition is one of the first publications to show the "SRT" scale.
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This pamphlet is from the Collection of: Clark McCoy
Scanes by: Clark McCoy