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New chapter on the Frasassi Caves, with Sandro Galdenzi https://t.co/DajRlarrYr From a new hypogene karst book https://t.co/D2A6EAxygR
New chapter on the Frasassi Caves, with Sandro Galdenzi https://t.co/DajRlarrYr From a new hypogene karst book https://t.co/D2A6EAxygR