Columbia subject headings:
Sakarya İli (Turkey)--Civilization.
Sakarya İli (Turkey)--Description and travel.
Sakarya İli (Turkey)--History.
Harvard subject headings:
Sakarya İli (Turkey)--Civilization.
Sakarya İli (Turkey)--Description and travel.
Sakarya İli (Turkey)--History.
Princeton subject headings:
Sakarya İli (Turkey)--Civilizationl.
Sakarya İli (Turkey)--Description and travel.
Sakarya İli (Turkey)--History.