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A Practical Guide to Better Concentration by Melvin Powers and Robert Starrett
Better Concentration Will Give You a Better Life |
In this unique book, you are shown how to improve your powers of memory and concentration so that you can easily remember names and faces as well as master any subject.
Concentration is an acquired power and anyone with normal intelligence can acquire it. You can too.
A Practical Guide to Better Concentration....$5.00
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