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Stick Fighting for Self-Defense: Yawara, Aikido, Cane, Police Club, Quarter-Staff (Athletic series of Thor Publishing Co): Bruce Tegnér: Amazon.com: Books
Why is Aikido looked down upon in the martial arts community when it's used in combat systems by various militaries, including special operations? - Quora
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Do Japanese police (including detectives) need to practise martial arts? If yes, what style do they practise? - Quora
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