Columbia subject headings:
Asylum, Right of--United States.
Political refugees--Soviet Union.
Political refugees--United States.
Soviets (People)--United States.
United States--Emigration and immigration--Government policy.
United States--Emigration and immigration.
United States. Immigration and Naturalization Service.
Harvard subject headings:
Princeton subject headings:
Asylum, Right of--United States.
Political refugees--Soviet Union.
United States--Emigration and immigration--Government policy.
United States. Immigration and Naturalization Service