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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