Columbia subject headings:
Chihuahua (Mexico : State)--Description and travel.
El Camino Real (Calif.)
Mexico--Commerce--United States.
United States--Commerce--Mexico.
Harvard subject headings:
Camino Real.
Chihuahua (Mexico : State)--Description and travel.
Mexico--Commerce--United States.
United States--Commerce--Mexico.
Princeton subject headings:
Camino Real.
Chihuahua (Mexico : State)--Description and travel.
Mexico--Commerce--United States.
United States--Commerce--Mexico.