Columbia subject headings:
Mexico--Foreign relations--United States.
Tijuana (Baja California, Mexico)
United States--Foreign relations--Mexico.
Urbanization--Mexico--Baja California (Peninsula)
Harvard subject headings:
Mexico--Foreign relations--United States.
Tijuana (Baja California, Mexico)
Tijuana (Baja California, Mexico)--Social conditions.
United States--Foreign relations--Mexico.
Urbanization--Mexico--Baja California (State)
Princeton subject headings:
Mexico--Foreign relations--United States.
Tijuana (Baja California, Mexico)
United States--Foreign relations--Mexico.
Urbanization--Mexico--Baja California (State).