Contribution à l'étude de certains schistes houillers.
Wedi'i Gadw mewn:
| OCLC: | 41209204 |
|---|---|
| Prif Awdur: | |
| Iaith: | French |
| Cyhoeddwyd: |
[1952]
|
| Pynciau: | |
| Fformat: | Traethawd Ymchwil Monograph Note that CRL will digitize material from the collection when copyright allows. |