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There is a page named "File:Japan sex by age 1925.png" on Wikipedia
compatible license as the original. https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English...(978 × 640 (31 KB)) - 23:02, 22 October 2020
This file has an extracted image: Kerckhoff Laboratory 1930.png....(1,325 × 1,804 (59.79 MB)) - 22:21, 14 May 2024
