Helmersen, G. v. (1969). Geognostische Untersuchungen in den..
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Chicago Style (17th ed.) Citation
Helmersen, Gregor von. Geognostische Untersuchungen in Den.. 1969.
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MLA (9th ed.) Citation
Helmersen, Gregor von. Geognostische Untersuchungen in Den.. 1969.
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Warning: These citations may not always be 100% accurate.