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Carl Friedrich Gau signature.svg Signature of yearold Gau of about CarlFriedrichGau Namenszugvon UTC derivative work Pbroks talk CarlFriedrichGau Namenszugvon Carl Friedrich Gau Redrawn to SVG format Pbroks CarlFriedrichGau Namenszugvon PDold original upload log This image is derivative work of the following images Image