Breaker Tests. Comparison between Ku-Ken, Pegson and Norton Pick Breakers in crushing Maesgwyn Large (1359/69/WW) Sep 1969
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dpro/ncb6/d/dpro/ncb/6/1529
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- ReferenceGB 216 D/D PRO/NCB/6/1529
- Dates of CreationSep 1969
- Language of MaterialEnglish
- Physical Description1 file