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101	PDF Document Add to Reading List Source URL: www.caves.org Language: English - Date: 2008-03-06 13:49:03 Geography of Arizona Physical geography Geography of the United States Show cave Whetstone Mountains Cave Kartchner Caverns State Park San Pedro Valley Sonoran Desert
102	PDF Document Add to Reading List Source URL: whc.unesco.org Language: English - Date: 2004-05-13 05:16:05 Show caves Caving organizations Škocjan Caves Reka Karst Kras Grotto Sežana Cave Physical geography Geography Landforms
103	PDF Document Add to Reading List Source URL: carsologica.zrc-sazu.si Language: English - Date: 2006-08-07 12:37:01 Cave Physical geography Show caves Postojna Cave