SOLÍS-CARCAÑO, R.; MORENO, E. I.; ARCUDIA-ABAD, C. Study of the Concrete”™s Compressive Strength Due to the Combined Effect oWater-cement ratio, the Coarse-fine Aggregate Ratio and the Source of the Aggregatesf the. Revista Técnica de la Facultad de Ingeniería. Universidad del Zulia, v. 31, n. 3, 11.