Columbia subject headings:
Harvard subject headings:
Sanitation--Mexico--Córdoba (Veracruz-Llave)--History.
Urban hydrology--Mexico--Córdoba (Veracruz-Llave)--History.
Urban sanitation--Mexico--Córdoba (Veracruz-Llave)--History.
Water resources development--Mexico--Córdoba (Veracruz-Llave)--History.
Water-supply--Mexico--Córdoba (Veracruz-Llave)--History.
Princeton subject headings:
Sanitation--Mexico--Córdoba (Veracruz-Llave)--History.
Urban hydrology--Mexico--Córdoba (Veracruz-Llave)--History.
Water-supply--Mexico--Córdoba (Veracruz-Llave)--History.