copyright 1953; Picket, Inc. publishers; 64 page booklet; b/w illustrations; very good condition with minimal ageing and wear.
 
from Preface -
...When people have difficulty in learning to use a slide rule, usually it is not because the instrument is difficult to use.  The reason is likely to be that they do not understand the mathematics on which the instrument is based, or the formulas they are trying to evaluate...