245: $a Codebreaking and Signals Intelligence
245: $b
100: $a
082: $a 355.3432 AND
650: $a
020: $a 0-7146-3299-6
440: $v
250: $b Frank Cass & Co Ltd
250: $c 1986
250: $a 1st
300: $a 137
020: $c Not Available
041: $a English
Available Yes, Accessions:[ 26527 ]
246:
246: # Signals Intelligence; Cryptography-History; Tsarist Codebreakers and british Codes; German Military Agencies; Polish Bomba to British Bombe; Birth of Ultra; Surveillance and Intelligence-Vichy Regime