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2by Taylor, Phil, MacMullen, Jackie, Wertheim, L Jon, Wahl, Grant, Bias, Kelvin C, Bechtel, MarkGet full text
Published in Sports illustrated
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3by WHITE, M. A, COLENBRANDER, K, OLAN, R. W, PENSWICK, L. BGet full text
Published in Mechanical engineering (New York, N.Y. 1919)
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