Jerzy Ró¿ycki: List of cryptographers, Mathematician, Enigma machine, Bug River

Maksymilian Ci¿¿ki: Province of Posen, Biuro Szyfrów, Enigma machine, Invasion Poland, Cipher,...

Raft River: List of Rivers Idaho, Bear River (Utah)

Bug Machine (2 LPs)

Cryptanalysis of the Enigma: Enigma, Biuro Szyfrów, Cyclometer, Perforated sheets, Bomba (cryptography),...