PESHCHERY (CAVES) Numery 5(6), 12-13.

Former Speleological Bulletin founded in 1947. Perm. Geographical Society in the USSR, po

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PESHCHERY (CAVES) Numery 5(6), 12-13. Former Speleological Bulletin founded in 1947. Perm. Geographical Society in the USSR, po

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