Whymper, E. (2024). The Ascent of the Metterhorn. Cervantes Digital.
Chicago-čujuhus (17. p.)Whymper, Edward. The Ascent of the Metterhorn. [lugar no identificado]: Cervantes Digital, 2024.
MLA-čujuhus (9. p.)Whymper, Edward. The Ascent of the Metterhorn. Cervantes Digital, 2024.
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