International yearbook of education, Vol. XXVI, 1964.
International yearbook of education, Vol. XXVI, 1964.
- Geneva : Paris : IBE, UNESCO, 1965.
- 435 p.
- IBE, piblication ; 274. .
OC 37 (100) 20 "1964" INN Vol. 26
OC 37 (100) 20 "1964" INN Vol. 26