Columbia subject headings:
Emigration and immigration--Library resources--Directories.
Emigration and immigration--Research--Directories.
Emigration and immigration--Study and teaching--Directories.
Migration, Internal--Library resources--Directories.
Migration, Internal--Research--Directories.
Migration, Internal--Study and teaching--Directories.
Harvard subject headings:
Emigration and immigration--Library resources--Directories.
Emigration and immigration--Research--Directories.
Emigration and immigration--Study and teaching--Directories.
Migration, Internal--Library resources--Directories.
Migration, Internal--Research--Directories.
Migration, Internal--Study and teaching--Directories.
Princeton subject headings:
Emigration and immigration--Library resources--Directories.
Emigration and immigration--Research--Directories.
Emigration and immigration--Study and teaching--Directories.
Migration, Internal--Library resources--Directories.
Migration, Internal--Research--Directories.
Migration, Internal--Study and teaching--Directories.