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LINKS
SAVE Society of Akumal's Vital Ecology/Salvamento Akumal de Vida Ecológica The National Speleological Society (NSS) NSS - Cave Diving Section Association for Mexican Cave Studies Centro Ecológico Akumal QRSS Quintana Roo Speleological Survey El Proyecto de Buceo Espeleológico México y América Central INAH National Institute of Anthropology and History GEO Grupo de Exploración Ox Bel Ha Oldest Skeleton in Americas found in Underwater Cave, E. Barclay, National Geographic, September 3, 2008 Cave Diver's Forum Xibalba, Walter Pickel and Jon Bojar, Advanced Diver Magazine, 2010 Undersea Cave Yields One of Oldest Skeletons in Americas, K. Than, National Geographic, September 14, 2010 |
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