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Thomas G. Beckman, Jose X. Chaparro, and Wayne B. Sherman
Pág. 128 - 131
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.G. Beckman, J. Rodriguez Alcazar, W.B. Sherman, and D.J. Werner
Pág. 523 - 524
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Beckman, T G; Pusey, P L
Pág. 101 - 103
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Reighard, Gregory L; Parker, Michael L; Krewer, Gerard W; Beckman, Thomas G;
Pág. 250 - 252
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Beckman, T G; Krewer, G W; Sherman, W B
Pág. 958 - 959
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Nyczepir, A P; Beckman, T G
Pág. 772
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