Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Mexico--Tabasco (State)
Cacao--Economic aspects--Mexico--Tabasco (State)
Family farms--Mexico--Tabasco (State)
Petroleum industry and trade--Mexico--Tabasco (State)
Princeton subject headings:
Agriculture--Economic aspects--Mexico--Tabasco (State).
Cacao--Economic aspects--Mexico--Tabasco (State).
Family farms--Mexico--Tabasco (State).
Petroleum industry and trade--Mexico--Tabasco (State).