Columbia subject headings:
Harvard subject headings:
John, of Dara, Metropolitan of Dara, active 9th century. De oblatione.
Lord's Supper (Liturgy)
Syrian churches--History.
Princeton subject headings:
Iwannis, Metropolitan of Dara, 9th century. De oblatione.
Lord's Supper (Liturgy)
Syriac Christians--Antiquities.
Syrian Church--History--Middle Ages, 600-1500.