Nikoleta Tzankova

Department of Mineralogy and Petrography, University of Mining and Geology “St Ivan Rilski”, 1700 Sofia, Bulgaria
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University of Chemical Technology and Metallurgy, 8 Kl.Ohridsky Blvd, 1756 Sofia, Bulgaria

Volume 49 2 August 2020

University of Mining and Geology “St Ivan Rilski”, Department of Mineralogy and Petrography, 1700 Sofia, Bulgaria
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Regional Historical Museum – Pernik, 2 Fizkulturna Str., 2300 Pernik, Bulgaria

Volume 48 2 August 2019