Abbas Khodier Abbas, and Nagham Yusif Abd Alreda. “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, vol. 20, no. 68, part 1, Dec. 2024, pp. 91-102, doi:10.25130/tjaes.20.68.1.5.