Opencast Working at Derwen Site. Unidentified Seam. Core Hole No.341 (Open Hole 321), Core Hole No.340 (Open Hole 330) (556/60/9 O.C) Oct 1960
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dpro/ncb6/d/dpro/ncb/6/719
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- ReferenceGB 216 D/D PRO/NCB/6/719
- Dates of CreationOct 1960
- Language of MaterialEnglish
- Physical Description1 file