%0 Journal Article %A Isfahani, Karam, Soleimani, Nader, toorani, heidar, Sabahi, Parviz %T Design and validate a model for the professional development of school principals in a mixed manner %J Journal of New Approaches in Educational Administration %V 11 %N 45 %P 103-132 %D 2020 %R %U https://sanad.iau.ir/fa/Article/1180762