General and Interwar

Bury, Jan. "From the Archives: Polish Interwar MFA's Cipher Compromised?" Cryptologia 31, no. 3 (Jul. 2007): 268-277.

Abstract: "A 1940 report suggests that the cryptosystem used by the interbellum Polish Ministry of Foreign Affairs had been compromised, enabling the Germans to read the encrypted diplomatic traffic of the Poles and learn about their plans in advance."

Bury, Jan. "Polish Codebreaking during the Russo-Polish War of 1919-1920." Cryptologia 28, no. 3 (Jul. 2004): 193-203.

The author "discusses the early Polish signals intelligence and codebreaking efforts of the 1919-1920 war and emphasizes their role in Poland's victory during the crucial battle of Warsaw in August 1920."

Tebinka, Jacek. "British and Polish Intelligence Services in the 20th Century: Co-operation and Rivalry." Acta Poloniae Historica 84 (2001): 101-136.

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