Columbia subject headings:
Agricultural laborers, Foreign--Government policy--United States.
Illegal immigration--Government policy--United States.
Manpower policy, Rural--United States.
Migrant agricultural laborers--Government policy--United States.
Noncitizens--Government policy--United States.
Harvard subject headings:
Agricultural laborers, Foreign--Government policy--United States.
Illegal immigration--Government policy--United States.
Manpower policy, Rural--United States.
Migrant agricultural laborers--Government policy--United States.
Noncitizens--Government policy--United States
Princeton subject headings:
Agricultural laborers, Foreign--Government policy--United States.
Illegal aliens--Government policy--United States.
Manpower policy, Rural--United States.
Migrant agricultural laborers--Government policy--United States.