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Archival descriptionCopy of typed letter from P.M.S. Blackett to John Godfrey, Director Naval Intelligence, and copy and original of typed letter from PMSB to MHAN
Copy of typed letter from P.M.S. Blackett to John Godfrey, Director Naval Intelligence, and copy and original of typed letter from PMSB to MHAN
ALS from P.M.S. Blackett, Ruislip, to MHAN
ALS from P.M.S. Blackett, Ruislip, to MHAN
ALS from Northwood
ALS from Northwood