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12. Vzostup jurských operencov Creator: Mikula, Peter Type: article, model:article, and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
13. Zmysel pre zemský magnetizmus sa zrejme ukrýva vo vnútornom uchu! Creator: Mikula, Peter Type: article, model:article, and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public