Graig Merthyr Colliery. Degradation of Sized Coal in Preparation Plant (94/55/1) Nov 1955
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dpro/ncb6/d/dpro/ncb/6/265
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- ReferenceGB 216 D/D PRO/NCB/6/265
- Dates of CreationNov 1955
- Language of MaterialEnglish
- Physical Description1 file