Brynlliw Colliery - Six Feet Seam, Seam Sections S25 & S26 Faces, also the effect of Swansea Six Feet and Three Feet coal on the ash content of the dry duff mixture (1576/74/SW) Dec 1973
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- ReferenceGB 216 D/D PRO/NCB/6/1627
- Dates of CreationDec 1973
- Language of MaterialEnglish
- Physical Description1 file