International yearbook of education, Vol. XXV, 1963.
International yearbook of education, Vol. XXV, 1963.
- Geneva : Paris : IBE, UNESCO, 1963.
- 487 p.
- IBE publication ; 262. .
OC 37 (100) =20 "1963" INN No.25.
OC 37 (100) =20 "1963" INN No.25.