Record revealed
The first American invention to obtain an English patent
Piece
Catalogue reference: MAF 33/520
This record is about the Survey of fertiliser practice: grants and reports, 1942-3, 1943-4 dating from 1941-1947 in the series National Agricultural Advisory Service and predecessors: Education and Research Correspondence.... It is held at The National Archives, Kew.
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Survey of fertiliser practice: grants and reports, 1942-3, 1943-4
MAF 33
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Survey of fertiliser practice: grants and reports, 1942-3, 1943-4
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