Cmwgwili Colliery. Upper 9 Ft and 4 Ft and Upper 6 Ft, Stannllyd and Big Vein. Seam Samples taken by Mr Ashleigh Bryan on the instruction of the Colliery Manager (SWL 1595/74) 1974
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- ReferenceGB 216 D/D PRO/NCB/6/1657
- Dates of Creation1974
- Language of MaterialEnglish
- Physical Description1 file