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- PUB6
- Not specified3
- Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)2
- BSD 3-Clause "New" or "Revised" license2
- http://creativecommons.org/licenses/by-nc-nd/3.0/2
- http://opensource.org/licenses/BSD-3-Clause2
- Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)1
- Creative Commons - Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)1
- GNU General Public License1
- http://creativecommons.org/licenses/by-nc-sa/4.0/1
- http://creativecommons.org/licenses/by-sa/3.0/1