Columbia subject headings:
Admission of nonimmigrants--United States.
September 11 Terrorist Attacks, 2001.
Student passports--United States.
United States. Immigration and Naturalization Service.
Harvard subject headings:
Admission of nonimmigrants--United States.
September 11 Terrorist Attacks, 2001.
Student passports--United States.
United States. Immigration and Naturalization Service.
Princeton subject headings:
Admission of nonimmigrants--United States.
September 11 Terrorist Attacks, 2001.
Student passports--United States.
United States. Immigration and Naturalization Service