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2
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Designing valve gearing/ by Edward J. Cowling Welch.
- 621.1
- Welch, Edward J. Cowling.
- E. & F.N. Spon,
- 1875.
- London :
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Egyptian irrigation / by W. Willcocks ; with introd. by J.C. Ross.
- 627.52
- Willcocks, William, 1852-1932.
- E. & F.N. Spon,
- 1889.
- London :