TY  - BOOK
ED  - UNESCO
TI  - Source book in environmental education for secondary school teachers
U1  - 301.31 UN2S 
PY  - 1990///
CY  - Bangkok
PB  - : UNESCO Principal Regional office, 
KW  - Environmental education - Resource materials - Source book
KW  - | Environmental education - Programming planing
KW  - | Environmental Education - Curriculum development
KW  - | Environmental Education - Secondary grades
KW  - | Environmental Education - Teaching methods
KW  - | Environmental Education - Reaching methods - Teacher training
ER  -