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Start Over Subjects Construction Materials ✖Remove constraint Subjects: Construction Materials Authors Horsford, Eben Norton, 1818-1893, author ✖Remove constraint Authors: Horsford, Eben Norton, 1818-1893, author Titles Report on the patents and processes in the manufacture of the American building block ✖Remove constraint Titles: Report on the patents and processes in the manufacture of the American building block

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