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Start Over Formats Text ✖Remove constraint Formats: Text Authors Barker, George F. (George Frederick), 1835-1910, author ✖Remove constraint Authors: Barker, George F. (George Frederick), 1835-1910, author Titles Some modern aspects of the life-question: address of Prof. George F. Barker, president of the American Association for the Advancement of Science, Boston meeting, August, 1880 ✖Remove constraint Titles: Some modern aspects of the life-question: address of Prof. George F. Barker, president of the American Association for the Advancement of Science, Boston meeting, August, 1880

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  • Some modern aspects of the life-question: address of Prof. George F. Barker, president of the American Association for the Advancement of Science, Boston meeting, August, 18801