Varlez, L. (1929). Migration problems and the Havana Conference of 1928. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Varlez, Louis. Migration Problems and the Havana Conference of 1928. International Labour Organization, 1929.
Citatione MLA (9a ed.)Varlez, Louis. Migration Problems and the Havana Conference of 1928. International Labour Organization, 1929.
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