British Waterways Board
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British Waterways Board: Southern Region
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British Waterways Board: Southern Regional Engineer
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Maps and plans
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Maps and plans of the Grand Union Canal
BW167/26/5/4/7/8
Tringford Reservoir Construction of Gauging Station on Tring Drainage Feeder Into Reservoir
Location plan, plan, sections and details.
29 March 1963
BW167/26/5/4/7/8
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