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× 2001 Paul LaViolette Astronomer Discovers Interstellar Signals of Intelligent Origin. 2001 Paul LaViolette Astronomer Discovers Interstellar Signals of Intelligent Origin. $9.99
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× 1990 Eldon Byrd- The De La Warr Camera Theory of Operation History and Implications 1990 Eldon Byrd- The De La Warr Camera Theory of Operation History and Implications $9.99
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