Columbia subject headings:
Harvard subject headings:
Indians of Mexico--Mexico--Tlaxcala (State)--History--Congresses.
Tlaxcala (Mexico : State)--Economic conditions--Congresses.
Tlaxcala (Mexico : State)--History--Congresses.
Princeton subject headings:
Tlaxcala (Mexico : State)--History--Congresses.
Tlaxcala (Mexico : State)--Social conditions--Congresses.