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| Title | Cwmorthin Slate Quarry |
| Author | Isherwood,G |
| Date | 1982 |
| Pages | 90 |
| Publisher | Merionith Press |
| Copyright © | Author |
| ISBN | 0 946895 00 7 |
| Subject | Mines Britain Wales |
| Number | E/1413 |
| Type | Book |