Image: Àbac de Gerbert
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Description: Representation of a part of Gerbert abacus. Numbers are represented using moder charcaters.
Title: Àbac de Gerbert
Credit: Own work
Author: JRGomà
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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