GNU自由文档许可证
GNU自由文档许可证（簡稱GFDL）是一个反版權个授權，好拨自由文件引用个。伊由自由软件基金会創造。
链接进来[编辑]
- Guide to the new drafts of documentation licenses
- GFDL official text
- Free Software and Free Manuals, essay by Richard Stallman
- Why Wikivoyage isn't GFDL: Problems with using the GFDL for short printed texts