Onllwyn No.3. Colliery. White Four Ft. Seam (287/58/9) Sep 1958
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dpro/ncb6/d/dpro/ncb/6/474
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- ReferenceGB 216 D/D PRO/NCB/6/474
- Dates of CreationSep 1958
- Language of MaterialEnglish
- Physical Description1 file