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Continue to ChatAn unusual example of Ottoman paper instruments: The calendar of Derviş Mehmed el-Hasib el- Mevlevi - https://avesis.istanbul.edu.tr/yayin/18fdc1d6-ccd6-4538-99a6-9c5de486fc7f/an-unusual-example-of-ottoman-paper-instruments-the-calendar-of-dervis-mehmed-el-hasib-el-mevlevi