Columbia subject headings:
African Americans.
Constitutional amendments--United States.
United States. Constitution. 13th Amendment.
United States. Constitution. 14th Amendment.
United States. Constitution. 15th Amendment.
Harvard subject headings:
African Americans
African Americans--Legal status, laws, etc.--United States.
Constitutional amendments--United States
Constitutional amendments--United States.
United States. Constitution. 13th Amendment.
United States. Constitution. 14th Amendment.
United States. Constitution. 15th Amendment.
Princeton subject headings:
African Americans.
Constitutional law--United States.
United States. Constitution. 13th Amendment
United States. Constitution. 14th Amendment
United States. Constitution. 15th Amendment