Ruslan Kostov

Department of Mineralogy and Petrography, Faculty of Geology and Prospecting, University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia, Bulgaria

Volume 39 1-2 September 2010

Gemmologisches Institut Hamburg, Gerhofstrasse 19, 20354 Hamburg, Germany
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University of Mining and Geology, St. Ivan Rilski“, 1700 Sofia, Bulgaria

Volume 39 1-2 September 2010

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Volume 22 4 August 1992

University Paris VI, Laboratory "Mineralogy and Crystallography", Paris 75230 Cedex 05
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Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113
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Geological Institute "Strashimir Dimitrov", Bulgarian Academy of Sciences, Sofia 1113
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Geological Institute "Strashimir Dimitrov", Bulgarian Academy of Sciences, Sofia 1113

Volume 18 5 October 1988