Dr. Jason Armstrong

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Karate Styles: Surprising Links to Shortened Lifespan
Armstrong, Dr Jason

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� 17.71

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Street Fighting Statistics with Medical Outcomes linked to Karate & Bunkai Selection
Armstrong, Dr. Jason

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� 67.57

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Karate Theory Manual
Armstrong, Phd & 7Th Dan, Jason

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� 5.45

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Seienchin - Karate and the Kata
Armstrong, Jason

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� 8.72

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Japanese Language for Martial Artists
Armstrong, Jason; Sumida, Mayuko

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� 14.15

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