Columbia subject headings:
Harvard subject headings:
Greeks--Pontus--Social conditions--20th century.
Greeks--Pontus--Social life and customs--20th century.
Pontus--History--20th century.
Princeton subject headings:
Greeks--Pontus--Social conditions--20th century--Statistics.
Greeks--Pontus--Social conditions--20th century.
Greeks--Pontus--Social life and customs--20th century.
Pontus--History--20th century.
Statistics.