Columbia subject headings:
Environmental education--South America.
Environmental sciences--Study and teaching (Elementary)--Bolivia.
Environmental sciences--Study and teaching (Elementary)--Colombia.
Environmental sciences--Study and teaching (Elementary)--Ecuador.
Environmental sciences--Study and teaching (Elementary)--Peru.
Environmental sciences--Study and teaching (Elementary)--Venezuela.
Treaty for Amazonian Cooperation
Harvard subject headings:
Princeton subject headings:
Environmental education--South America.
Environmental sciences--Study and teaching (Elementary)--Bolivia.
Environmental sciences--Study and teaching (Elementary)--Colombia.
Environmental sciences--Study and teaching (Elementary)--Ecuador.
Environmental sciences--Study and teaching (Elementary)--Peru.
Environmental sciences--Study and teaching (Elementary)--Venezuela.
Treaty for Amazonian Cooperation