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books%3Fid=bGwvAAAAMAAJ&q=district+of+columbia+eight-hour+day+1892&pg=PA47
books%3Fid=bGwvAAAAMAAJ&q=district+of+columbia+eight-hour+day+1892&pg=PA47
https://books.google.com/books%3Fid=bGwvAAAAMAAJ&q=district+of+columbia+eight-hour+day+1892&pg=PA47
16th Street Bridge (Washington, D.C.)
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books%3Fid=bGwvAAAAMAAJ&q=district+of+columbia+eight-hour+day+1892&pg=PA47
https://books.google.com/books%3Fid=bGwvAAAAMAAJ&q=district+of+columbia+eight-hour+day+1892&pg=PA47