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- PUB7
- Creative Commons - Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)3
- http://creativecommons.org/licenses/by-nc-sa/4.0/3
- Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)1
- Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)1
- GNU General Public Licence, version 31
- GNU General Public License 2 or later (GPL-2.0)1
- http://creativecommons.org/licenses/by-nc-sa/3.0/1
- http://creativecommons.org/licenses/by-sa/3.0/1
- http://opensource.org/licenses/GPL-2.01
- http://opensource.org/licenses/GPL-3.01