rgg-2015-04-573http://www.ipgg.sbras.ru/ru/Files/publications/ibc/rgg-2015-04-573.pdfrgg-2015-04-573publ-duration-of-the-first-biozone-in-the-siberian-hypostratotype-046839

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publ-duration-of-the-first-biozone-in-the-siberian-hypostratotype-046839