Columbia subject headings:
Johnson, Andrew, 1808-1875--Impeachment.
Reconstruction.
Stevens, Thaddeus, 1792-1868.
Sumner, Charles, 1811-1874.
Harvard subject headings:
Johnson, Andrew, 1808-1875--Impeachment.
Reconstruction.
Stevens, Thaddeus, 1792-1868
Sumner, Charles, 1811-1874.
Princeton subject headings:
Johnson, Andrew, 1808-1875.
Reconstruction (U.S. history, 1865-1877)
Stevens, Thaddeus, 1792-1868.
Sumner, Charles, 1811-1874.