"The Venlo Incident, World War Investigator 13/1990, London 1990, S. 2–13". Retrieved 1 December 2015. Sigismund Payne Best profile, venlo-zwischenfall.de;...
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Best#Second World War intelligence work Richard Henry Stevens, www.venlo-zwischenfall.de (in German) D. Cameron Watt, ‘Best, Sigismund Payne (1885–1978)’...
4 KB (455 words) - 12:24, 31 March 2024