Não informado. (1950). Quarterly Bulletin of Steel Statistics for Europe. United Nations, Economic Commission for Europe.
Cita Chicago Style (17a ed.)Não informado. Quarterly Bulletin of Steel Statistics for Europe. Geneve, Suíça: United Nations, Economic Commission for Europe, 1950.
Cita MLA (8a ed.)Não informado. Quarterly Bulletin of Steel Statistics for Europe. United Nations, Economic Commission for Europe, 1950.
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