Columbia subject headings:
Cities and towns--Mexico--History.
Sociology, Urban--Mexico--Puebla de Zaragoza.
Sociology, Urban--Mexico--Veracruz-Llave (State)
Harvard subject headings:
Cities and towns--Mexico--History.
Sociology, Urban--Mexico--Puebla.
Sociology, Urban--Mexico--Veracruz.
Princeton subject headings:
Cities and towns--Mexico--History.
Sociology, Urban--Mexico--Puebla.
Sociology, Urban--Mexico--Veracruz-Llave (State).