Columbia subject headings:
Lacandona Forest (Mexico)--Social conditions.
Las Cañadas (Mexico)--Economic conditions.
Las Cañadas (Mexico)--Social conditions.
Harvard subject headings:
Chiapas (Mexico)--Economic conditions.
Chiapas (Mexico)--Social conditions.
Lacandona Forest (Mexico)--Social conditions.
Princeton subject headings:
Lacandona Forest (Mexico)--Description and travel.