izvvgr-2010-2-92http://www.ipgg.sbras.ru/ru/Files/publications/ibc/izvvgr-2010-2-92.pdfizvvgr-2010-2-92publ-uchebnik-o-glavnoy-stikhii-nashey-planety-2010-031780

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publ-uchebnik-o-glavnoy-stikhii-nashey-planety-2010-031780