Educational achievements of thirteen-year-olds in twelve countries : results of an international research project, 1959-61 /
Wedi'i Gadw mewn:
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Hamburg :
UNESCO Institute for Education,
1962.
|
| Cyfres: | International studies in education (Hamburg, Germany) ;
|
| Pynciau: |
| Disgrifiad Corfforoll: | 68 p. |
|---|