Calculations with years and months in the Peruvian quipus / by Erland Nordenskiöld.
- Nordenskiöld, Erland, 1877-1932.
- Date:
- [1925]
Licence: In copyright
Credit: Calculations with years and months in the Peruvian quipus / by Erland Nordenskiöld. Source: Wellcome Collection.
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