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Gordon Welchman, Sir Peter Marychurch and ‘the birth of ultra’
Kay, P R, Marychurch, Peter, Milner‐Barry, StuartVolume:
1
Language:
english
Journal:
Intelligence and National Security
DOI:
10.1080/02684528608431854
Date:
May, 1986
File:
PDF, 218 KB
english, 1986