Columbia subject headings:
Appalachian Region--Social conditions--Congresses.
Appalachians (People)--Congresses.
Rural-urban migration--United States--Congresses.
Harvard subject headings:
Appalachian Region--Social conditions--Congresses.
Appalachians (People)--Congresses.
Rural-urban migration--United States--Congresses.
Princeton subject headings:
Appalachian Region--Social conditions--Congresses.
Appalachians (People)--Congresses.
Rural-urban migration--United States--Congresses.