Columbia subject headings:
Earthquakes--Turkey--History--20th century.
Gölcük (Turkey)--History.
İzmit Earthquake, Turkey, 1999.
Harvard subject headings:
Earthquakes--Turkey--History--20th century.
Gölcük (Turkey)--History.
İzmit Earthquake, Turkey, 1999.
Princeton subject headings:
Earthquakes--Turkey--History--20th century.
Gölcük (Turkey)--History.
İzmit Earthquake, Turkey, 1999.