| Iaith wreiddiol | Saesneg |
|---|---|
| Statws | Cyhoeddwyd - 1990 |
| Digwyddiad | International Special Education Conference. Facilitating Communication in Special Needs Education, Cardiff - Hyd: 1 Ion 1990 → … |
Cynhadledd
| Cynhadledd | International Special Education Conference. Facilitating Communication in Special Needs Education, Cardiff |
|---|---|
| Cyfnod | 1/01/90 → … |
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