Researches and important personsDoc. Josef Sekyra, importtant Czech geoligist, geomorphologist and polar explorer. | ||
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Virtual museum of the Czech Geological Survey, cgs.gov.cz, (C) Czech Geological Survey, 2011, v.1.00 [13.08.2025]
Researches and important personsDoc. Josef Sekyra, importtant Czech geoligist, geomorphologist and polar explorer. | ||