League of Nations. Economic Intelligence Service. Annuaire statistique de la Société des Nations: Statistical year-book of the League of Nations.
Citace podle Chicago (17th ed.)League of Nations. Economic Intelligence Service. Annuaire Statistique De La Société Des Nations: Statistical Year-book of the League of Nations. Genève.
Citace podle MLA (8th ed.)League of Nations. Economic Intelligence Service. Annuaire Statistique De La Société Des Nations: Statistical Year-book of the League of Nations.
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