Columbia subject headings:
El Alto (Bolivia)--Economic conditions.
El Alto (Bolivia)--Social conditions.
Pollution--Bolivia--El Alto.
Poverty--Bolivia--El Alto.
Harvard subject headings:
El Alto (Bolivia)--Economic conditions.
El Alto (Bolivia)--Social conditions.
Pollution--Bolivia--El Alto.
Poverty--Bolivia--El Alto.
Princeton subject headings:
El Alto (Bolivia)--Economic conditions.
El Alto (Bolivia)--Social conditions.
Pollution--Bolivia--El Alto.
Poverty--Bolivia--El Alto.