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DINKHA, Y.Z., HAIDO, J.H. and ALI, M.H. 2017. FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS MADE WITH ORDINARY AND HIGH STRENGTH CONCRETES: EFFECT OF INTERFACIAL ROUGHNESS BETWEEN OLD AND NEW CONCRETES. Journal of Duhok University. 20, 1 (Jul. 2017), 570-579. DOI:https://doi.org/10.26682/sjuod.2017.20.1.50.