Abbas Khodier Abbas, & Nagham Yusif Abd Alreda. (2024). Measuring the size of the gap in implementing the requirements of the environmental management system in accordance with the standard (ISO 14001: 2015): A case study in the Central Refineries Company/Al Dora. Tikrit Journal of Administrative and Economic Sciences, 20(68, part 1), 91–102. https://doi.org/10.25130/tjaes.20.68.1.5