Ratzel, F. (1889). Die Schneedecke besonders in deutschen Gebirgen.
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Citación estilo Chicago
Ratzel, Friedrich. Die Schneedecke Besonders in Deutschen Gebirgen. Stuttgart, 1889.
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Cita MLA
Ratzel, Friedrich. Die Schneedecke Besonders in Deutschen Gebirgen. 1889.
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Warning: These citations may not always be 100% accurate.