Columbia subject headings:
Harvard subject headings:
Ruiz, Nevado del (Colombia)--Eruption, 1985.
Volcanoes--Colombia--Eruption, 1985
Princeton subject headings:
Disaster relief--Colombia--Armero.
Floods--Colombia--Armero.
Lahars--Colombia--Armero.
Ruiz, Nevado del (Colombia)--Eruption, 1985.
Volcanoes--Colombia.