Columbia subject headings:
Border patrols--United States.
Illegal aliens--United States--Identification.
United States--Emigration and immigration--Government policy.
United States. Immigration and Naturalization Service--Management.
Harvard subject headings:
Identification cards--Forgeries--United States--Prevention.
Legal documents--United States--Identification.
United States--Emigration and immigration--Technological innovations.
United States. Immigration and Naturalization Service--Management.
Princeton subject headings:
Border patrols--United States.
Illegal aliens--United States--Identification.
United States--Emigration and immigration--Government policy.
United States. Immigration and Naturalization Service--Management.