Backup source of B.T2020 (No. 1)

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  • 1 (2016-02-25 (Thu) 01:41:36)

- https://en.wikipedia.org/wiki/Rec._2020

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/CIExy1931_Rec_2020.svg/300px-CIExy1931_Rec_2020.svg.png