TY  - BOOK
ED  - UNESCO
TI  - The multilateral exchange of educational audio-visual materials :  : existing mechanisms and suggestions for the future
SN  - 9231016948
AV  - IKR Q190.E34 
PY  - 1980///
CY  - Paris
PB  -  : UNESCO
KW  - Audio-visual materials
KW  - Science
KW  - Study and teaching
KW  - Mechanism (philosophy)
ER  -