Columbia subject headings:
Harvard subject headings:
Scott, Dred, 1809-1858.
Slavery--Law and legislation--United States
Slavery--United States--Legal status of slaves in free states
Slaves--Legal status, laws, etc.--United States.
Princeton subject headings:
Scott, Dred, 1809-1858.
Slavery--Law and legislation--United States.
Slavery--United States--Legal status of slaves in free states.