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Williams's Hydraulic Theory to Cheops's Pyramid (Popularity: )
Describes Williams's Hydraulic Theory to the construction of the Great Pyramid of Egypt, otherwise known ...
Category: Science\Social Sciences\Archaeology\Alternative
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Global Coral Reef Alliance (Popularity: )
Non-profit organization committed to coral reef preservation -- news, issues, projects, online papers.
Category: Science\Biology\Ecology\Aquatic Ecology
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