License
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- Attribution 4.0 (CC BY 4.0)726
- Attribution 3.0 United States206
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- Public Domain Mark 1.080
- Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0)76
- Attribution-NonCommercial-NoDerivs 3.0 United States55
- CC0 1.0 Universal53
- Attribution-ShareAlike 4.0 (CC BY-SA 4.0)35
- Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0)28
- Attribution-NonCommercial-ShareAlike 3.0 United States15
- Attribution-NoDerivs 3.0 United States7
- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)6
- Attribution-NonCommercial 3.0 United States6
- Attribution-ShareAlike 3.0 United States2
- Apache 2.01