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1Naengjŏn sigi Pulgaria sojae Hanbando kwallyŏn charyo = Documents from Bulgarian archives on Korean peninsula during the Cold War /냉전 시기 불가리아 소재 한반도 관련 자료 = Documents from Bulgarian archives on Korean peninsula during the Cold War /냉전 시기 불가리아 소재 한반도 관련 자료 = Documents from Bulgarian archives on Korean peninsula during the Cold War /Published 2020
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