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3“…Washington: US Department of Labor…”
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4American Trade Union Journals and labor papers currently received by the department of labor libraryPublished 1964.“…U.S. Department of Labor,…”
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5Published n.d.“…[U.S. Department of Labor],…”
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6Published [1955]“…U.S. Department of Labor,…”
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7Published n.d.“…U.S. Department of Labor],…”
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9Published [1955]“…U.S. Department of Labor,…”
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12Published 1922.“…U.S. Department of Labor,…”
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13Published 1966.“…U.S. Department of Labor,…”
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14“…US Department of Labor (Washington)…”
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16American Trade Union Journals and labor papers currently received by the department of labor libraryPublished 1954.“…U.S. Department of Labor,…”
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