Columbia subject headings:
Environmental health--Peru--Urubamba River Valley.
Gas industry--Environmental aspects--Peru--Urubamba River Valley.
Gas industry--Social aspects--Peru--Urubamba River Valley.
Indians of South America--Civil rights--Peru.
Indians of South America--Health and hygiene--Peru--Urubamba River Valley.
Machiguenga Indians--Health and hygiene.
Harvard subject headings:
Environmental health--Peru--Urubamba River Valley.
Gas industry--Environmental aspects--Peru--Urubamba River Valley.
Gas industry--Health aspects--Peru--Urubamba River Valley.
Gas industry--Social aspects--Peru--Urubamba River Valley.
Indians of South America--Civil rights--Peru.
Indians of South America--Health and hygiene--Peru--Urubamba River Valley.
Machiguenga Indians--Health and hygiene.
Machiguenga Indians--Social conditions.
Princeton subject headings:
Environmental health--Peru--Urubamba River Valley.
Gas industry--Health aspects--Peru--Urubamba River Valley.
Machiguenga Indians--Health and hygiene.
Machiguenga Indians--Social conditions.