BOUCHAREB K. The Role of Training Policy in Raising the Productivity of The Economic Institution Case Study: The National Petroleum Works Corporation (ENGTP). jege [Internet]. 2023Mar.19 [cited 2024May9];6(1):133-45. Available from: https://jege.univ-adrar.edu.dz/index.php?journal=jege&page=article&op=view&path[]=253