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https://hu.wikipedia.org/wiki/Ivan_Alekszandrovics_Szerov
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https://en.wikipedia.org/wiki/Ivan_Serov
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https://en.wikipedia.org/wiki/Soviet_submarine_B-59
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https://en.wikipedia.org/wiki/Operation_Anadyr
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https://en.wikipedia.org/wiki/Issa_Pliyev
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https://en.wikipedia.org/wiki/Foxtrot-class_submarine
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https://de.wikipedia.org/wiki/Projekt_641
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https://hu.wikipedia.org/wiki/641-es_tervszámú_tengeralattjáró
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https://www.warhistoryonline.com/world-war-ii/reverse-engineering-b29-soviet-tu4.html
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https://b-29s-over-korea.com/shortstories/russianclone.htm
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