Matches in Library of Congress for { ?s ?p Hours of labor Bibliography.. }
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- 07035012 subject "Hours of labor Bibliography.".
- 2006503082 subject "Hours of labor Bibliography.".
- 40038016 subject "Hours of labor Bibliography.".
- 75301539%2F%2Fr85 subject "Hours of labor Bibliography.".
- 75503897%2F%2Fr942 subject "Hours of labor Bibliography.".
- 84183073 subject "Hours of labor Bibliography.".
- l20000023 subject "Hours of labor Bibliography.".