Opencast Working at Tre Bevan Site. Bryn Vein Seam. Trial Pit No. 1. Bore Hole 10 (552/60/9 O.C.) Oct 1960
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- ReferenceGB 216 D/D PRO/NCB/6/723
- Dates of CreationOct 1960
- Language of MaterialEnglish
- Physical Description1 file