Empire Mining and Metallurgical Congress & Empire Council of Mining and Metallurgical Institutions. Proceedings - Empire Mining and Metallurgical Congress. Empire Mining and Metallurgical Congress.
Παραπομπή σε μορφή Chicago (17η εκδ.)Empire Mining and Metallurgical Congress και Empire Council of Mining and Metallurgical Institutions. Proceedings - Empire Mining and Metallurgical Congress. [s.l.]: Empire Mining and Metallurgical Congress.
Παραπομπή σε μορφή MLA (8th εκδ.)Empire Mining and Metallurgical Congress και Empire Council of Mining and Metallurgical Institutions. Proceedings - Empire Mining and Metallurgical Congress. Empire Mining and Metallurgical Congress.
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