Chrysocolla: Mineral information, data and localities.
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The last laveineopterid – The systematic and floristic relationships of Laveineopteris nervosa (Medullosales) from the Stephanian of the Czech Republic - ScienceDirect
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Czechoslovakia
Adpression of medullosan prepollen-producing organs, their prepollen and cuticles (Westphalian, Intrasudetic Basin, Czech Republic) - ScienceDirect
Sedimentární pánev – Wikipedie
Simplified geological map of Paleozoic rocks in the Holy Cross... | Download Scientific Diagram
Geographical position of the Eger (Ohře) valley between the Smrčiny... | Download Scientific Diagram