Columbia subject headings:
Beykoz (Istanbul, Turkey)
Conservation of natural resources--Turkey--Istanbul--Congresses.
Environmental policy--Turkey--Istanbul--Congresses.
Environmental protection--Turkey--Istanbul--Congresses.
Harvard subject headings:
Beykoz (Istanbul, Turkey)--Environmental conditions--Congresses.
Beykoz (İstanbul İli, Turkey)--Environmental conditions--Congresses.
Environmental protection--Turkey--Beykoz--Congresses.
Environmental protection--Turkey--Congresses.
Environmental protection--Turkey--İstanbul İli--Congresses.
Turkey--Environmental conditions--Congresses.
Princeton subject headings:
Conservation of natural resources--Turkey--Beykoz (Istanbul)--Congresses.
Environmental policy--Turkey--Beykoz (Istanbul)--Congresses.
Environmental protection--Turkey--Beykoz (Istanbul)--Congresses.