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Are you Willy Pieter, author of the books below?
Scientific Coaching for Olympic Taekwondo by Willy Pieter Taekwondo Studies by Willy Pieter Medieval Warrior Cultures of Europe and Japan by Michael A. DeMarco Taekyon by Stanley Henning Taekwondo Studies by Michael A. DeMarco Academic Approaches to Martial Arts Research, Vol. 1 by Michael A. DeMarco Academic Approaches to Martial Arts Research, Vol. 1 by Donohue John


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