Lewis, W. A. (1970). Summary: The causes of unemployment in less developed countries and some research topics. International Labour Organization.
Style de citation Chicago (17e éd.)Lewis, W. Arthur. Summary: The Causes of Unemployment in Less Developed Countries and Some Research Topics. International Labour Organization, 1970.
Style de citation MLA (9e éd.)Lewis, W. Arthur. Summary: The Causes of Unemployment in Less Developed Countries and Some Research Topics. International Labour Organization, 1970.
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