From the beginning [videorecording] video 1
| Awdur Corfforaethol: | |
|---|---|
| Awduron Eraill: | |
| Fformat: | Visual Material |
| Iaith: | English |
| Cyhoeddwyd: |
[New York]
Sandra Carter Productions, Inc.
1994
|
| Cyfres: | Secrets of Science
|
| Pynciau: |