Columbia subject headings:
Slavery--Southern States--History--19th century.
Slavery--Southern States--Justification.
Southern States--Politics and government--1775-1865.
Harvard subject headings:
Slavery--Southern States--History--19th century
Slavery--Southern States--Justification.
Southern States--Politics and government--1775-1865.
Princeton subject headings:
Slavery--Southern States--History--19th century.
Slavery--Southern States--Justification.
Southern States--Politics and government--1775-1865.