Donn F. Draeger
The Japanese concept of kata is as old as Japan itself.
Jiu Jitsu Livro
Ashida Kim Secrets Of The Ninja
Attacking Judo
Kashiwazaki, Katsuhiko, Nakanishi, Hidetoshi
Bernard J. Cosneck American Combat Judo (original)
Black Belt Magazine May 2015 USA
Black Belt March 2016 USA
