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Time is free, but it's priceless. You can't
own it, but you can use it. You can't keep
it, but you can spend it. Once you've lost it
you can never get it back.

Harvey MacKay

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Lean boeken top 5

(maart 2016)
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a3 problem solver john shook

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Before I came here, I was confused about this subject. Having listened to your lecture, I am still confused -- but on a higher level.

Enrico Fermi

Lean boekentips

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