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13th International Congress of Speleology 4th Speleological Congress of Latin América and Caribbean 26th Brazilian Congress of Speleology Brasília DF, 15-22 de julho deRoman Mining in the Valongo System (Portuga
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Document Date: 2010-07-27 14:50:10
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13th International Congress of Speleology 4th Speleological Congress of Latin América and Caribbean 26th Brazilian Congress of Speleology Brasília DF, 15-22 de julho deRoman Mining in the Valongo System (Portuga