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Kochegura V.V., Zubov A.G., Braytseva O.A. (1990) Magnetostratigraphy of Kamchatkan Holocene formations of soil and pyroclastics // Journal of Volcanology and Seismology. United Kingdom: Gordon and Breach Science Publishers S.А. and OPA Ltd.. Vol. 8, No. 6. pp. 825-849.