Columbia subject headings:
Foreign workers--Mexico.
Foreign workers--United States.
Mexican-American Border Region--History.
Teenage immigrants--Mexico.
Teenage immigrants--United States.
Harvard subject headings:
Foreign workers--Mexico.
Foreign workers--United States
Mexican-American Border Region--History
Teenage immigrants--Mexico.
Teenage immigrants--United States.
Princeton subject headings:
Foreign workers--Mexico.
Foreign workers--United States.
Mexican-American Border Region--History.
Teenage immigrants--Mexico.
Teenage immigrants--United States.