Performance standards governing new materials for sports von Gelberg, J Nadine

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Material Matters: Performance Standards Governing New Materials for Sports von Gelberg, J. Nadine

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The Lethal Weapon: How the Plastic Football Helmet Transformed the Game of Football, 1939-1994 von Gelberg, J. Nadine

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The Lethal Weapon: How the Plastic Football Helmet Transformed the Game of Football, 1939-1994 von Gelberg, J Nadine

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The rise and fall of the Polara asymmetric golf ball: No hook, no slice, no dice von Gelberg, J.N.

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