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Paulo Rema and L. Gouveia
N.Torrentera and R.A Zinn
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B.E. Abdel-Aziz , T.E. Ali and F.A. Ahmed
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P.A. Thacker and B.G. Rossnagel
J.C. Woodworth , M.D. Tokach , J.L. Nelssen , R.D. Goodband , P.R.O. Quinn and T.M. Fakler
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