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- Croesor (Wales), 2 results
- Merioneth (Wales), 1 results
- Slate industry -- Wales -- Gwynedd -- Archives., 1 results
- Quarries and quarrying -- Wales -- Gwynedd., 1 results
- Slate industry -- Wales -- Croesor., 1 results
- Quarries and quarrying -- Wales -- Croesor., 1 results
- Industrial engineers -- Wales -- Croesor -- Biography., 1 results
- Croesor Slate Quarry (Llanfrothen, Wales), 1 results