Residential area "Yuzhen Park" by Nikola Gruev
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Petropavlovski monastery #43 by Nikola Gruev
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Sofia: a capital in transition by Sotiris Blatsis
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Smolyan - 2016 by Nikola Gruev
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Maria Louisa - The public place for swimming and sun bathing by Nikola Gruev
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Balchik by Christian Binder
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Usoeto - near the town of Elena by Nikola Gruev
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Sofia guide - page 252 to 311 by Nikola Gruev
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Pamporovo by Nikola Gruev
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The Horseman of Madara by Nikola Gruev
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Bulgaria 2007- On the road III: from Pleven to Sofia by Doron Avi-Ad
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Perperikon by Nikola Gruev
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