TY  - JOUR
AU  - Salehikhah, Gulnar 
AU  - Bastam, Maryam 
AU  - Bastam, ziba
TI  - The effect of collaborative learning method on first grade students of Yasouj city
JO  -  Environmental sciences and geography knowledge
VL  - 1
IS  - 2
SP  - 
EP  - 
PY  - 2021
DO  - 
ER  -