Ekaterina Trifonova

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

Volume 31 3-4 December 2001

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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"Sofgeoprouchvane" Ltd.

Volume 30 1-2 June 2000

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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"Sofgeoprouchvane" Ltd., Sofia

Volume 29 3-4 December 1999

Bl. 36B, Lyulyakova gradina Str., 1113 Sofia
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Volume 29 3-4 December 1999

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

Volume 28 1-2 August 1998

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

Volume 27 1-2 August 1997

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

Volume 25 1 February 1995

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

Volume 25 1 February 1995

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

Volume 25 1 February 1995

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Volume 24 2 April 1994

Faculdado de Geologia, Universidad Complutense, 28040, Madrid
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Volume 23 5 October 1993

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

Volume 23 5 October 1993

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

Volume 23 2 April 1993

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

Volume 22 1 February 1992

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

Volume 20 6 December 1990

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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lnstitllle for Geology and Mineral Exploration ( lGME), 11527 Athens
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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Vsesoyuzniy Geologicheskiy lnstitut ( VSEGEI), 199026 Leningrad
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia
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lnstitllle for Geology and Mineral Exploration ( lGME), 11527 Athens
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lnstitllle for Geology and Mineral Exploration ( lGME), 11527 Athens

Volume 19 5 October 1989