Matches in Library of Congress for { ?s ?p Labor and laboring classes United States History 19th century.. }
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- 05021707 subject "Labor and laboring classes United States History 19th century.".
- 07033063 subject "Labor and laboring classes United States History 19th century.".
- 07033260 subject "Labor and laboring classes United States History 19th century.".
- 07034039 subject "Labor and laboring classes United States History 19th century.".