Columbia subject headings:
African Americans--Legal status, laws, etc.
African Americans--Legal status, laws, etc.--Washington (D.C.)
African Americans--Washington (D.C.)
Slavery--Law and legislation--Washington (D.C.)
Slavery--Washington (D.C.)
Harvard subject headings:
African Americans--Legal status, laws, etc.
African Americans--Legal status, laws, etc.--Washington (D.C.)
African Americans--Washington (D.C.)
Municipal ordinances
Slavery--Law and legislation--Washington (D.C.)
Slavery--Washington (D.C.)
Princeton subject headings:
African Americans--Legal status, laws, etc.
African Americans--Washington (D.C.)
Slavery--Washington (D.C.)