DWD 60,39,45,59 | How Many Double-walled Diamond String Figures Are There? — p.219 | [143-18] |
DD5 | Double Diamonds, Mirror Images, Optical Illusions, Coloured Loops, Red Setters, and a Moral Ending — p.2 | [143-20] |
![]() | Jun 11, 2025 © ISHINO Keiichiro – k16@chiba.email.ne.jp |