Pennsylvania State College. Dept. of Mining Engineering. (1894). The Mining bulletin. Dept. of Mining Engineering, Pennsylvania State College.
Citace podle Chicago (17th ed.)Pennsylvania State College. Dept. of Mining Engineering. The Mining Bulletin. [State College]: Dept. of Mining Engineering, Pennsylvania State College, 1894.
Citace podle MLA (8th ed.)Pennsylvania State College. Dept. of Mining Engineering. The Mining Bulletin. Dept. of Mining Engineering, Pennsylvania State College, 1894.
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