Columbia subject headings:
Harvard subject headings:
Families--Southern States--History--19th century--Congresses.
Slave labor--Southern States--Congresses.
Slavery--Southern States--Congresses.
Southern States--Race relations--Congresses.
Princeton subject headings:
Families--Southern States--History--19th century--Congresses.
Slave labor--Southern States--Congresses.
Slavery--Southern States--Congresses.
Southern States--Race relations--Congresses.