Columbia subject headings:
Harvard subject headings:
Agriculture--Southern States--History--19th century.
Ruffin, Edmund, 1794-1865.
Slavery--Southern States
Southern States--History--1775-1865.
Princeton subject headings:
Agriculture--Southern States--History--19th century.
Ruffin, Edmund, 1794-1865.
Slavery--Southern States.
Southern States--History--1775-1865.