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Publications (10)
- BGS - Mine Plans (large, zoomable) - Diphwys Casson Slate Quarries; 1 pages
- BGS - Mine Plans (large, zoomable) - Diphwys Casson Slate Quarries; 1 pages
- BGS - Mine Plans (large, zoomable) - Llwechwedd Maenofferen And Diphwys Areas And Sections; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan And Section Of The Diphwys Casson Slate Quarries In The Parish Of Festiniog County Of Merioneth; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan And Section Of The Diphwys Casson Slate Quarries In The Parish Of Festiniog County Of Merioneth; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan And Section Of The Diphwys Casson Slate Quarries In The Parish Of Festiniog County Of Merioneth; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan And Section Of The Diphwys Casson Slate Quarries In The Parish Of Festiniog County Of Merioneth; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan Of Diphwy Casson Old Slate Quarry; 1 pages
- BGS - Mine Plans (large, zoomable) - Plan Of The Diphwys Casson Slate Quarry In The Parish Of Festiniog; 1 pages
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
