Columbia subject headings:
Díaz, Porfirio, 1830-1915--Travel--Mexico--Yucatán (State)
Yucatán (Mexico : State)--History.
Harvard subject headings:
Díaz, Porfirio, 1830-1915--Travel--Mexico--Yucatán (State)
Yucatán (Mexico : State)--History.
Princeton subject headings:
Díaz, Porfirio, 1830-1915--Travel--Mexico--Yucatán (State).
Yucatán (Mexico : State)--History.