Columbia subject headings:
Trabzon (Turkey)--History--Congresses.
Trabzon (Turkey)--Religious life and customs--Congresses.
Harvard subject headings:
Trabzon (Turkey)--History--Congresses.
Trabzon (Turkey)--Religious life and customs--Congresses.
Princeton subject headings:
Trabzon (Turkey)--History--Congresses.
Trabzon (Turkey)--Religious life and customs--Congresses.