- In Copyright (1938)
- Creative Commons BY Attribution 4.0 International (1489)
- Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International (461)
- Creative Commons BY-NC Attribution-NonCommercial 4.0 International (200)
- cc-by-3.0 (46)
- cc-by-nc-3.0 (20)
- http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (17)
- https://creativecommons.org/licenses/by-nc/3.0/legalcode (13)
- Copyright not evaluated (6)
- https://creativecommons.org/licenses/by-nc/3.0/ (4)
4441 件のレコードが見つかりました。