International yearbook of education, Vol. XXVIII, 1966.
International yearbook of education, Vol. XXVIII, 1966.
- Geneva : Paris : IBE, UNESCO, 1967.
- 452 p.
- IBE publication ; 298. .
OC 37 (100) =20 "1966" INN Vol. 28
OC 37 (100) =20 "1966" INN Vol. 28