%0 Journal Article %A Farhadfar, Mozhgan, delkhosh kasmayi, abolghasem, Safari, Mahmoud %T Providing a Model to develop a model for school principals based on a competency-based approach (Case Study: Tehran Secondary School %J Quarterly Journal of Training and Development of Human Resources %V 8 %N 30 %P 73-108 %D 2021 %R 10.52547/istd.31103.8.30.73 %U https://rimag.ir/fa/Article/31103