G.E.S.S. - Group for Underwater and Speleological Exploration, Bucharest, Romania. Green Mountain Holidays - Guided caving trips in the Apuseni Mountains, Romania. Caving Club - Based in Cluj Napoca, Romania. Piatra Altarului Cave Protection Club - Information about activities undertaken in Altar Cave, Romania. Romanian Speleological Federation - National oraganisation of Romania.
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