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Sub-series

ROOM 40 OB NAVAL INTELLIGENCE DIVISION: WIRELESS INTERCEPTS/DECRYPTS

Catalogue reference: Sub-series within ADM 223

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Sub-series within ADM 223

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Reference
Sub-series within ADM 223
Title
ROOM 40 OB NAVAL INTELLIGENCE DIVISION: WIRELESS INTERCEPTS/DECRYPTS
Record URL
https://beta.nationalarchives.gov.uk/catalogue/id/C74391/

Series information

ADM 223

Admiralty: Naval Intelligence Division and Operational Intelligence Centre: Intelligence...

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Within the series: ADM 223

Admiralty: Naval Intelligence Division and Operational Intelligence Centre: Intelligence...

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ROOM 40 OB NAVAL INTELLIGENCE DIVISION: WIRELESS INTERCEPTS/DECRYPTS

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