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Taylor P. Ludwick, Robert H. Poppenga, Peter G. Green, Birgit Puschner, Larry A. Melton, Bruce R. Hoar, Nicole L. Nyberg, and John Maas
Pág. 314 - 320
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Birgit Puschner, Robert H. Poppenga, Linda J. Lowenstine, Michael S. Filigenzi, and Patricia A. Pesavento
Pág. 616 - 624
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