A guide to the overhead projector.
Wedi'i Gadw mewn:
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Lond. :
British Association for Commercial and Industrial Education,
1964.
|
| Pynciau: |
| Disgrifiad Corfforoll: | 42p. |
|---|