Flaut C, Flaut D, Hoskova-Mayerova S, Vasile R, & University of Defence<U+0009>. From Old Ciphers to Modern Communications.
Chicago-viite (17. p.)Flaut C, Flaut D, Hoskova-Mayerova S, Vasile R, ja University of Defence<U+0009>. From Old Ciphers to Modern Communications.
MLA-viite (9. p.)Flaut C, et al. From Old Ciphers to Modern Communications.
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