Technical bulletin - Dept. of Energy, Mines and Resources, Mines Branch.
Wedi'i Gadw mewn:
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Cyfresol |
| Iaith: | English |
| Cyhoeddwyd: |
Ottawa,
1959-
|
| Pynciau: |
| Cyhoeddwyd: | Began with July 1959 issue. |
|---|---|
| Disgrifiad Corfforoll: | v. ill. 28 cm. |
| Llyfryddiaeth: | Includes bibliographies. |
| ISSN: | 0576-2685 |