International yearbook of education, Vol. XX, 1958.
International yearbook of education, Vol. XX, 1958.
- Geneva : Paris : IBE, UNESCO, 1958.
- 432 p.
- IBE publication ; 202. .
OC 37 (100) =20 "1958" INN Vol. 20
OC 37 (100) =20 "1958" INN Vol. 20