Report - Pertanika J. Sci. & Technol. 21 (1): 625 - 634 (2013 ...tekniksipil.umy.ac.id/wp-content/uploads/2014/02/27-Page-625-634.pdf · Pertanika J. Sci. & Technol. 21 (1): 625 - 634 (2013)

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