224 items
| Subject | Labor History |
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| Subject | Labor History |
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| Creator | The Pennsylvania Historical and Museum Commission |
| Date |
| Subject | Labor History |
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| Creator | The L.A. Black Worker Center |
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| Subject |
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| Creator | Duquesne University |
| Date |
| Subject | Labor History |
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| Creator | The Pennsylvania Labor History Society |
| Date | 2011-09-16 |
| Subject | Labor History |
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| Subject | Pittsburgh History |
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| Creator | Charles McCollester |
| Subject | Pittsburgh History |
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| Creator | Bill Yund |
| Subject | Labor History |
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| Date | 2010-01-04 |
| Subject | Labor History |
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| Subject | Labor History |
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| Creator | Charles McCollester |
| Subject |
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| Creator | Tri-State Conference on Steel |
| Subject |
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| Creator | The Tri-State Conference on Steel |
| Subject |
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| Creator | Tri-State Conference on Steel |
| Subject |
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| Creator | United Steelworkers of America |
| Subject | Labor History |
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| Subject |
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| Creator | Tri-State Conference on Steel; United Steelworkers of America |
| Subject |
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| Creator | Monsignor Charles Owen Rice |
| Subject | Labor History |
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| Creator | Charles McCollester |
| Date | 2009 |
| Subject | Labor History |
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| Date | 2012-04-28 |
| Subject |
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| Creator | Charles McCollester |
1991-11-21 |
1984-10-29 |
1985-01-18 |
1986-01-08 |
1986-01-08 |
| Date | 1940 |
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