Columbia subject headings:
Harvard subject headings:
Henequen (Plant)--Mexico--Yucatán (State)
Yucatán (Mexico : State)--Economic conditions.
Yucatán (Mexico : State)--Politics and government.
Princeton subject headings:
Henequen (Plant)--Mexico--Yucatán.
Yucatán (Mexico : State)--Economic conditions.
Yucatán (Mexico : State)--Politics and government.