Affiliation: | 1. University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Department of Mineralogy, Petrology and Mineral Resources, Pierottijeva 6, HR-10000 Zagreb, Croatia;2. University of Namibia, Faculty of Science, Department of Geology, Windhoek, Namibia;3. University of Namibia, Faculty of Science, Department of Biological Sciences, Windhoek, Namibia |