عبد حسن ر.س. and احمد ي.ع.ا. 2020. The effect of the environmental management system on the clean production strategy / case study in Middle Refineries Company. Journal of Economics and Administrative Sciences. 26, 121 (Aug. 2020), 257–281. DOI:https://doi.org/10.33095/jeas.v26i121.1950.