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H. A. Penna
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Wray Lloyd and H. A. Penna
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Wray Lloyd and H. A. Penna
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Wray Lloyd and H. A. Penna
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H. H. Smith, H. A. Penna, and A. Paoliello
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T. de Brito, E. Freymüller, D. O. Penna, H. S. Santos, S. Soares de Almeida, P. A. Ayroza Galvão, and V. G. Pereira
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