No. 1 Area. Cynheidre Colliery: Cross Measure 5 (I) Sequence and Structure (Divisional Geologists Report) (II) Seam Analyses and Characteristics (Coal Survey Report) (1991) Sep 1961
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- ReferenceGB 216 D/D PRO/NCB/6/150
- Dates of CreationSep 1961
- Language of MaterialEnglish
- Physical Description1 file