Columbia subject headings:
Mexico--History--Revolution, 1910-1920.
Yucatán (Mexico : State)--History.
Harvard subject headings:
Mexico--History--Revolution, 1910-1920.
Yucatán (Mexico : State)--History.
Princeton subject headings:
Mexico--History--Revolution, 1910-1920.
Yucatán (Mexico : State)--History.