Archipov O. Death classified as secret. Volume 3. Letters from Ivdel. Archival search in the investigation of the causes of the death of Dyatlovs group. In Russian /Arkhipov O. Smert pod grifom sekretno. Tom 3. Pisma iz Ivdelya. Arkhivnyy poisk v rassledovanii prichin gibeli gruppy Dyatlova. Directing 2021 524 p. Please contact us for details on condition of available copies of the book. SKUalbafdbc128f74576ea.