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4Book Conference Proceedings
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7by Pop, Emil I. , Published in Vorträge des XIV. Berg- und Hüttenmännischen Tages (1963)Book Component Part
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8by Müller, Bruno , Published in Geologische Jahresberichte : B, Regionale Geologie (1939)Volume Special Print
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10by Hague, Arnold; Emmons, Samuel Franklin , 1877In collection: USA: Professional papers of the Engineer DepartmentBook
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