WESTERMANN, W. L. (1955). The Slave systems of Greek and Roman antiquity. The American philosophical society.
Chicago-čujuhus (17. p.)WESTERMANN, William L. The Slave Systems of Greek and Roman Antiquity. Philadelphia: The American philosophical society, 1955.
MLA-čujuhus (9. p.)WESTERMANN, William L. The Slave Systems of Greek and Roman Antiquity. The American philosophical society, 1955.
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