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bulgariia » bulgarica, bulgaricae, bulgarian, bulgareiia, vulgariia, bulgeriia
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
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1
Published 2016
Springer International Publishing
Table of Contents: “... -- Demographic Potential and Problems of the Settlements Network in the Mountains of Bulgaria -- Demographic...”
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2
Published 1994
Springer Berlin Heidelberg
Table of Contents: “... and Hydrocarbon Potential of Bulgaria -- 3 Exploration History, Geology and Hydrocarbon Potential in the Czech...”