TY  - BOOK
AU  - Ball, Desmond||Tamura, Keiko
TI  - Breaking Japanese Diplomatic Codes: David Sissons and D Special Section during the Second World War
KW  - world war 2||cryptography||Australia||Cipher||Empire of Japan||GCHQ||London||Multiple encryption||Russia||Tokyo
UR  - https://library.oapen.org/bitstream/20.500.12657/33529/1/459995.pdf||https://library.oapen.org/bitstream/20.500.12657/33529/1/459995.pdf
ER  -