
Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
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juni
14
2011

Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
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De ware ontdekkingsreis is geen speurtocht naar nieuwe landschappen, maar het waarnemen met nieuwe ogen. Marcel Proust |
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