Não informado. (1977). Steel times international. Fuel and Metallurgical Journals.
Lua i Stíl Chicago (17ú heag.)Não informado. Steel Times International. Surrey, Inglaterra: Fuel and Metallurgical Journals, 1977.
Lua MLA (8ú heag.)Não informado. Steel Times International. Fuel and Metallurgical Journals, 1977.
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