TY  - JOUR
AU  - َAkhari, Morteza
AU  - Taghvaei, Maryam
AU  - Safarian Hamedani, Saeed
TI  - Identifying the factors affecting professional development among secondary school principals in North Khorasan Province
JO  - The Journal of Modern Thoughts in Education
VL  - 18
IS  - 3
SP  - 1
EP  - 14
PY  - 2021
DO  - 
ER  -