Não informado. (1948). Metal Treatment and Drop Forging. Fuel and Metallurgical Journals.
Lua i Stíl Chicago (17ú heag.)Não informado. Metal Treatment and Drop Forging. London: Fuel and Metallurgical Journals, 1948.
Lua MLA (8ú heag.)Não informado. Metal Treatment and Drop Forging. Fuel and Metallurgical Journals, 1948.
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