Oscar A. Cevallos, David Jaramillo, Carlos Ávila, Ximena Aldaz. Production and Quality Levels of Construction Materials in Andean Regions: A Case Study of Chimborazo, Ecuador. JCDC [Internet]. 2017 Aug. 30 [cited 2026 Sep. 14];22(1):115–136. Available from: https://ejournal.usm.my/jcdc/article/view/jcdc_vol22-no-1-2017_7