파일:Heckert GNU white.svgAurelio A. Heckert, the copyright holder of this work, hereby publishes it under the following licenses: This file is licensed under the Creative Commons
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파일:Heckert GNU.png A GNU Head Source: The GNU Art Gallery, http://www.gnu.org/graphics/heckert_gnu.html Author: Aurélio A. Heckert, http://aurium.cjb.net/ License: Free
파일:Heckert GNU white.png Aurélio A. Heckert sent an email authorizing the commercial use of this image. In his message, he clarifies that his image is a redraw from this work
파일:The GNU logo.pngA GNU Head Source: The GNU Art Gallery, http://www.gnu.org/graphics/heckert_gnu.html Author: Aurélio A. Heckert, http://aurium.cjb.net/ License: Free