This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Arithmetic Conventions for Conversion Between Roman i.e. Ottoman and Egyptian Measurement WDL. Artwork ru fr Shaykh Muammad al Umar alShfi en Shaykh Muammad al Umar alShfi zh Shaykh Muammad al Umar alShfi pt Shaykh Muammad al Umar alShfi ar es Shaykh Muammad al Umar alShfi ru fr Conventions arithmtiques