Columbia subject headings:
Coastal ecology--Mexico--Yucatán (State)
Natural resources--Mexico--Yucatán (State)
Yucatán (Mexico : State)--Economic conditions.
Harvard subject headings:
Coastal ecology--Mexico--Yucatán (State)
Natural resources--Mexico--Yucatán (State)
Yucatán (Mexico : State)--Economic conditions.
Princeton subject headings:
Coastal ecology--Mexico--Yucatán (State).
Natural resources--Mexico--Yucatán (State).
Yucatán (Mexico : State)--Economic conditions.