Columbia subject headings:
Regional planning--California--San Diego Metropolitan Area.
Regional planning--Mexico--Tijuana Metropolitan Area (Baja California)
Transnationalism.
Harvard subject headings:
Cities and towns--Mexican-American Border Region.
San Diego (Calif.)--Social conditions.
Tijuana (Baja California, Mexico)--Social conditions.
Princeton subject headings:
Cities and towns--Mexican-American Border Region.
San Diego (Calif.)--Social conditions.
Tijuana (Baja California, Mexico)--Social conditions.