Não informado. (1950). Quarterly Bulletin of Steel Statistics for Europe. United Nations, Economic Commission for Europe.
Čikaški stil citiranja (17. izdanje)Não informado. Quarterly Bulletin of Steel Statistics for Europe. Geneve, Suíça: United Nations, Economic Commission for Europe, 1950.
MLA način citiranja (8. izdanje)Não informado. Quarterly Bulletin of Steel Statistics for Europe. United Nations, Economic Commission for Europe, 1950.
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