WITNESS

Maqālah fī anna al-kurah awsaʿ al-ashkāl al-mujassamah allatī iḥāṭatuhā mutasāwiyyah wa-anna al-dāʾirah awsaʿ al-ashkāl al-musaṭṭaḥah allatī iḥāṭatuhā mutasāwiyyah_Berlin_Staatsbibliothek (Berlin)_Ms. or. oct._2970