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Keywords:
LAND,
DRAINAGE,
MAINTENANCE,
RESERVOIRS,
STORAGE,
FLOODS,
WATER SUPPLY,
TIDAL,
RIVERS,
COSTS,
AUTOMATIC,
SLUICES,
ENGLAND,
WALES,
BALA LAKE,
RIVER TRENT,
RIVER CRAY,
UK
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© Thomas Telford and ICE
1954
