Columbia subject headings:
Human ecology--Turkey--Kocaeli İli--Congresses.
Kocaeli İli (Turkey)--Economic policy--Congresses.
Kocaeli İli (Turkey)--Population--Congresses.
Harvard subject headings:
Princeton subject headings:
Kocaeli İli (Turkey)--Population--Congresses.
Sustainable development--Turkey--Kocaeli İli--Congresses.