Columbia subject headings:
African Americans--History--1863-1877.
African Americans--History--To 1863.
African Americans.
Lincoln, Abraham, 1809-1865.
Harvard subject headings:
African Americans--History--1863-1877
African Americans--History--To 1863
Lincoln, Abraham, 1809-1865--Relations with African Americans.
Slaves--Emancipation--United States
Princeton subject headings: