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Labor in the United States
Cohen, Sanford, (1975)
Labor in a free society
Harrington, Michael, (1959)
When workers fight : the politics of industrial relations in the progressive era, 1898 - 1916
Ramirez, Bruno, (1978)
Amerikas Gewerkschaften : Geschichte, Struktur, Probleme der Gewerkschaften in USA
Sander, Greif, (1966)