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1
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2Published 1977Subjects: “...Labor unions United States History....”
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4
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5by Livshit︠s︡, Roman ZinovʹevichSubjects: “...Labor laws and legislation Soviet Union....”
Published 1977
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8Published 1976Subjects: “...Labor supply Soviet Union....”
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9by Petrov, Vladimir, 1915-Subjects: “...Convict labor Russia (Federation) Siberia....”
Published 1949
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11
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12
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13Published 1879Subjects: “...African American agricultural laborers Southern States Photographs....”
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