Columbia subject headings:
Natural disasters--Research--Ecuador--Quito.
Seismology--Research--Ecuador.
Volcanoes--Research--Ecuador.
Harvard subject headings:
Landslide hazard analysis--Ecuador--Quito.
Natural disasters--Ecuador--Quito.
Princeton subject headings:
Earthquakes--Research--Ecuador.
Natural disasters--Research--Ecuador--Quito.
Volcanoes--Research--Ecuador.