https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse...
https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English Magic circles devised by Yang Hui...
DescriptionYangHui magic circle 1 - Arabic numerals.png Nederlands: Gebaseerd op File:YangHui magic circle 1.jpg en en:Magic circle (mathematics) English:...
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse...