Columbia subject headings:
African Americans--Biography.
African Americans--History--To 1863.
Antislavery movements--United States.
Langston, John Mercer, 1829-1897.
United States--Race relations.
Harvard subject headings:
African Americans--Biography
African Americans--History--To 1863
Antislavery movements--United States
Langston, John Mercer, 1829-1897.
United States--Race relations
Princeton subject headings:
African Americans--Biography.
African Americans--History--To 1863.
Antislavery movements--United States.
Langston, John Mercer, 1829-1897.
United States--Race relations.