Обложка книги The Power Of Concentration (1918), Theron Q Dumont  
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2006
196 страниц
Категория: Психология
ISBN: 9781594621413
Язык: Английский

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📙 We all know that in order to accomplish a certain thing we must concentrate. It is of the utmost value to learn how to concentrate. To make a success of anything you must be able to concentrate your entire thought upon the idea you are working out.
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