Dilly
by Mavis Batey
Popularity 1
xxiii, 244 pages, 16 unnumbered pages of plates : 20 cm
World War, 1914-1918World War, 1939-1945CryptographyCryptographersBiographyHistoryGreat britain, biographyWorld war, 1939-1945, cryptographyElectronic data processing personnelKnox, A. D. (Alfred Dillwyn), 1884-1943World War, 1914-1918 -- CryptographyWorld War, 1939-1945 -- Cryptography