Columbia subject headings:
Water-supply--Turkey--Istanbul--History.
Water-supply--Turkey--Istanbul--Sources.
Water-supply--Turkey--Istanbul.
Harvard subject headings:
Concessions--Turkey--Istanbul--History.
Dersaadet Su Şirketi--History.
Drinking water--Turkey--Istanbul--History.
Istanbul (Turkey)--History--19th century.
Istanbul (Turkey)--History--20th century.
Public-private sector cooperation--Turkey--Istanbul--History.
Water--Turkey--Istanbul--Distribution--History.
Water-supply--Turkey--Istanbul--History.
Water-supply--Turkey--Istanbul--Sources.
Water-supply--Turkey--Istanbul.
İstanbul Sular İdaresi--History.
Princeton subject headings:
Water-supply--Turkey--Istanbul--History.
Water-supply--Turkey--Istanbul--Sources.
Water-supply--Turkey--Istanbul.