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geoloogias kivimite absoluutse vanuse määramise meetodid, mille aluseks on radioaktiivsete isotoopide konstantne poolestusaeg
изотопные методы . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/%D0%B8%D0%B7%D0%BE%D1%82%D0%BE%D0%BF%D0%BD%D1%8B%D0%B5%20%D0%BC%D0%B5%D1%82%D0%BE%D0%B4%D1%8B/1/rus (27.10.2026)