“The Relationship between Lean Maintenance and Green Maintenance and their Impact on Enhancing Sustainable Development: A Case Study at the North Oil Company of Iraq” (2021) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 45(2), pp. 147–160. doi:10.55562/jrucs.v45i2.119.