Umasekar V. Sustainable Lean Procurement and Contract Management in Oil and Gas Industry. Int. J. Multidiscip. Appl. Bus. Edu. Res. [Internet]. 2024 May 25 [cited 2026 Jan. 24];5(5):1872-964. Available from: https://ijmaberjournal.org/index.php/ijmaber/article/view/1712