Wilhelm, O. (1921). Die Eisen-Mangan-Erzlagerstätten im unteren Aversertal (Val Ferrera) Graubünden.
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Chicago Style (17th ed.) Citation
Wilhelm, Oskar. Die Eisen-Mangan-Erzlagerstätten Im Unteren Aversertal (Val Ferrera) Graubünden. Halle/S, 1921.
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MLA (9th ed.) Citation
Wilhelm, Oskar. Die Eisen-Mangan-Erzlagerstätten Im Unteren Aversertal (Val Ferrera) Graubünden. 1921.
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Warning: These citations may not always be 100% accurate.