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Charles H. Porter and Frank H. Collins
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Charles H. Porter and Richard C. Collins
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Charles H. Porter and Richard C. Collins
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Charles H. Porter and Richard C. Collins
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Charles H. Porter and Richard C. Collins
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Charles H. Porter and Richard C. Collins
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Frank H. Collins, Charles H. Porter, and Stanton E. Cope
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Charles H. Porter, Richard C. Collins, and A. David Brandling-Bennett
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Edgar D. Rowton, Margarita de Mata, Nidia Rizzo, Charles H. Porter, and Thomas R. Navin
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