Capturing enigma how HMS Petard seized the German naval codes

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Bibliographic Details
Main Author: HarperlhStephen
Format: Book
Published: Stroud, EnglandlbSutton Pub.lc1999
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090 0 0 |a D810.C88  |b .H37 1999 
100 1 0 |a HarperlhStephen 
245 1 0 |a Capturing enigma  |b how HMS Petard seized the German naval codes  |c Stephen Harper 
260 0 0 |a Stroud, EnglandlbSutton Pub.lc1999 
300 |a 180p. [8]p. of plates  |b ill.  |c 21cm 
504 0 0 |a Includes bibliographical references (p.[173]-174) and index 
610 1 0 |a Petard (ship) 
610 1 0 |a Great Britain  |c Royal Navy 
650 0 0 |a World war, 1939-1945  |x Cryptography 
650 0 0 |a World war, 1939-1945  |x Naval operations, British 
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