License
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- Public Domain Mark 1.011
- Attribution-NonCommercial-NoDerivs 3.0 United States9
- All rights reserved8
- CC0 1.0 Universal6
- Attribution 3.0 United States5
- Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0)5
- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)1
- Attribution-NonCommercial 4.0 (CC BY-NC 4.0)1