Columbia subject headings:
Harvard subject headings:
Indians of Mexico--Agriculture--Mexico--Yucatán (State)
Mayas--Agriculture
Orchards--Mexico--Yucatán (State)
Vegetable gardening--Mexico--Yucatán (State)
Princeton subject headings:
Indians of Mexico--Mexico--Yucatan (State)--Agriculture.
Mayas--Agriculture.
Orchards--Mexico--Yucatan (State).
Vegetable gardening--Mexico--Yucatan (State).