Matches in Library of Congress for { ?s ?p Construction workers Labor unions United States History.. }
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- 00093286 subject "Construction workers Labor unions United States History.".
- 2005000655 subject "Construction workers Labor unions United States History.".
- 94010047 subject "Construction workers Labor unions United States History.".
- 94035335 subject "Construction workers Labor unions United States History.".
- 99095101 subject "Construction workers Labor unions United States History.".