Columbia subject headings:
Harvard subject headings:
Biosphere reserves--Economic aspects--Mexico--Quintana Roo (State)
Biosphere reserves--Mexico--Quintana Roo (State)
Mayas--Mexico--Quintana Roo (State)
Natural areas--Economic aspects--Mexico--Quintana Roo (State)
Natural areas--Mexico--Quintana Roo (State)
Reserva de la Biosfera de Sian Ka'an (Mexico)
Princeton subject headings:
Natural areas--Economic aspects--Mexico--Quintana Roo (State).
Natural areas--Mexico--Quintana Roo (State).
Reserva de la Biosfera de Sian Ka'an (Mexico)