Matches in Library of Congress for { ?s ?p Labor unions United States History Sources.. }
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- 2003018328 subject "Labor unions United States History Sources.".
- 2004048918 subject "Labor unions United States History Sources.".
- 73013105 subject "Labor unions United States History Sources.".
- 79089751 subject "Labor unions United States History Sources.".
- 82112067 subject "Labor unions United States History Sources.".
- 84002469 subject "Labor unions United States History Sources.".
- 86893468 subject "Labor unions United States History Sources.".
- 88023407 subject "Labor unions United States History Sources.".
- 96627161 subject "Labor unions United States History Sources.".