Chalk-drawn silhouette of a human head with gears on a black background, human brain concept
Chalk-drawn silhouette of a human head with gears on a black background, human brain concept

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Dieses Bild kann unter der Creative Commons 2.0 Lizenz kostenlos verwendet werden, wenn der Name des Urhebers Marco Verch genannt und auf diese Fotoseite verlinkt wird. Beispiel:

Photo: Chalk-drawn silhouette of a human head with gears on a black background, human brain concept by Marco Verch under Creative Commons 2.0

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