Putzer, H., & Sauer, W. (1971). Mineralische Rohstoffe in Ecuador.
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Chicago Style (17th ed.) Citation
Putzer, Hannfrit, and Walther Sauer. Mineralische Rohstoffe in Ecuador. 1971.
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MLA (9th ed.) Citation
Putzer, Hannfrit, and Walther Sauer. Mineralische Rohstoffe in Ecuador. 1971.
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