Columbia subject headings:
Jewish labor unions.
Jews--Migrations.
Socialism.
Soviet Union--Emigration and immigration.
United States--Emigration and immigration.
Harvard subject headings:
Jewish labor unions
Jews--Employment--United States.
Jews--Migrations.
Socialism.
Soviet Union--Emigration and immigration.
United States--Emigration and immigration.
Princeton subject headings:
Jews--Employment.
Jews--Migrations.
Socialism.
Soviet Union--Emigration and immigration.
United States--Emigration and immigration.