TY  - BOOK
ED  - Organisation for economic co-operation and development. Education and development
TI  - mathematical models in educational planning
T2  - Technical reports
U1  - 370.18 O28m 
PY  - 1967///
CY  - Paris
PB  - OECD
KW  -  Educational planning
KW  -  OECD countries
KW  -  Mathematical models
ER  -