Ez︠h︡egodnik 2001
Serii︠a︡ "Speleologicheskie issledovanii︠a︡"
(
Issue 3
)
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M.
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The present collection of articles is devoted to the study of artificial caves and underground architectural constructions. The materials touch upon a range of themes from results of numerous practical researches carried out in caves, mines and catacombs, and classification of artificial caves, the history of cave monasteries, Internet news in the field, and survey equipment.