List of illustrations to paper ‘Percussive drilling in hard rock’ by D. Simpson and V.S. Parry
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- Bookmark:https://archiveshub.jisc.ac.uk/data/gb214-d624/d624/4/9/5/5
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- ReferenceGB 214 D624/4/9/5/5
- Dates of Creationc1950
- Physical Description2 papers