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P. Heleerattanawattana, T. Senjuntichai, E. Limsu, | 국제구조공학회(TECNO-PRESS) | 2004 ,
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Phelps, Edmund S, 320-P538p | W W Norton & Company | 1985 320-P538p,
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Phelps-Gunn, Trisha, 840.2-P541w | Aspen Systems Corp. | 1982 840.2-P541w,
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