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The first American invention to obtain an English patent
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Catalogue reference: MAF 218/31
This record is about the Investigation into effects of winter rainfall 1950/51 on field drainage system: memo... dating from 1951-1954 in the series Ministry of Agriculture and Fisheries and Ministry of Agriculture, Fisheries and.... It is held at The National Archives, Kew.
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Investigation into effects of winter rainfall 1950/51 on field drainage system: memo to County Agricultural Officers; maps and plans
MAF 218
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Investigation into effects of winter rainfall 1950/51 on field drainage system: memo...
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