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Chung-Jan Chang, Ruth Donaldson, Phil Brannen, Gerard Krewer, and Robert Boland
Pág. 413 - 417
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George E. Boyhan, Gerard Krewer, Darbie M. Granberry, C. Randell Hill, and William A. Mills
Pág. 1484 - 1485
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Reighard, Gregory L; Parker, Michael L; Krewer, Gerard W; Beckman, Thomas G;
Pág. 250 - 252
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