Columbia subject headings:
Harvard subject headings:
Agriculture, Cooperative--Mexico--Yucatán (State)
Sisal (Fiber)
Sisal (Plant)
Yucatán (Mexico : State)--Economic conditions.
Princeton subject headings:
Agriculture, Cooperative--Mexico--Yucatán (State).
Sisal (Fiber)
Sisal (Plant)
Yucatán (Mexico : State)--Economic conditions.