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Stephen Hawking

Jede mathematische Formel in einem Buch halbiert die Verkaufszahl dieses Buches.

This entry was posted on Montag, November 2nd, 2009 at 13:38 and is filed under Marketing, Umsatzsteigerung. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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