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Olga Gray and the Woolwich Arsenal Spy Ring
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Catalogue reference: ADM 258/80
This record is about the Effect of discrete frequency components on acoustic safe depth of minesweepers dating from 1954 in the series Admiralty: Underwater Countermeasures and Weapons Establishment and predecessors:.... It is held at The National Archives, Kew.
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Effect of discrete frequency components on acoustic safe depth of minesweepers
ADM 258
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Effect of discrete frequency components on acoustic safe depth of minesweepers
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