![avatar](/media/users/nas-3/8b3b867e-4f78-446e-9ec1-90d970d35b22/avatar-1578742460.png)
Ruud
Registered since 19/05/2018
I am a retired physicist and IT-manager,Living in the Netherlands .
Books published by Ruud
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$ 55.16
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$ 46.11
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$ 31.41
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$ 73.99
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$ 36.33
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$ 53.52
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$ 82.17