Figure Skating

http://skateguard1.blogspot.no/2015/06/skating-in-sonjas-shadow-erna-andersen.html

https://www.facebook.com/starsonice/videos/10152937044040936/ # SOIHowToTuesday  from Kimmie Meissner! "Double axel has always been ...

Ice dynamics

https://www.sports.ru/tribuna/blogs/dobroefk/1197273.html

http://www.twizzle.ru/video/

Sonja Henie Lake Placid 1932 Ulrich Salchow