Columbia subject headings:
Cobá (Mexico)--History.
Cobá Site (Mexico)
Human ecology--Mexico--Cobá.
Mayas--History.
Mayas--Social life and customs.
Rain forest ecology--Mexico--Cobá.
Harvard subject headings:
Cobá (Mexico)--History.
Cobá Site (Mexico)
Human ecology--Mexico--Cobá.
Mayas--History
Mayas--Social life and customs
Rain forest ecology--Mexico--Cobá.
Princeton subject headings:
Cobá (Mexico)--History.
Cobá Site (Mexico)
Human ecology--Mexico--Cobá.
Mayas--History.
Mayas--Social life and customs.
Rain forest ecology--Mexico--Cobá.