Não informado. (1934). Mining and metallurgy. American Institute of Mining and Metallurgical Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Mining and Metallurgy. New York: American Institute of Mining and Metallurgical Engineers, 1934.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Mining and Metallurgy. American Institute of Mining and Metallurgical Engineers, 1934.
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