Columbia subject headings:
Johnson, Andrew, 1808-1875--Archives.
Johnson, Andrew, 1808-1875--Correspondence.
Presidents--United States--Archives.
Presidents--United States--Correspondence.
United States--Politics and government--1849-1877.
Harvard subject headings:
Johnson, Andrew, 1808-1875.
Presidents--United States--Correspondence
United States--Politics and government--1849-1877.
Princeton subject headings:
Johnson, Andrew, 1808-1875--Correspondence.
Presidents--United States--Correspondence.
United States--Politics and government--1849-1877.