Columbia subject headings:
Detention of persons--United States--Evaluation.
Illegal immigration--United States.
Noncitizens--United States.
United States. Immigration and Naturalization Service.
Harvard subject headings:
Detention of persons--United States--Evaluation.
Illegal immigration--United States.
Noncitizens--United States
United States. Immigration and Naturalization Service
Princeton subject headings:
Detention of persons--United States--Evaluation.
Illegal aliens--United States.
United States. Immigration and Naturalization Service