Columbia subject headings:
Harvard subject headings:
Armenians--Turkey--History--20th century--Sources.
Erzurum (Turkey)--History--20th century--Sources.
Russia--Foreign relations--Turkey--History--20th century--Sources.
Turkey--Ethnic relations--History--20th century--Sources.
Turkey--Foreign relations--Russia--History--20th century--Sources.
World War, 1914-1918--Campaigns--Turkey, Eastern--Sources.
Princeton subject headings:
Erzurum (Turkey)--History--20th century--Sources.
World War, 1914-1918--Campaigns--Turkey, Eastern--Sources.