Columbia subject headings:
Harvard subject headings:
Indians of South America--Ecuador--Oriente--Social conditions.
Oil pollution of water--Ecuador--Oriente.
Petroleum industry and trade--Environmental aspects--Ecuador--Oriente.
Petroleum waste--Environmental aspects--Ecuador--Oriente.
Rain forest ecology--Ecuador--Oriente.
Princeton subject headings:
Indians of South America--Ecuador--Oriente--Social conditions.
Petroleum industry and trade--Environmental aspects--Ecuador--Oriente.
Petroleum waste--Environmental aspects--Ecuador--Oriente.
Rain forest ecology--Ecuador--Oriente.