Columbia subject headings:
Hamlin, Hannibal, 1809-1891.
Lincoln, Abraham, 1809-1865--Political career before 1861.
Harvard subject headings:
Campaign biography--United States.
Campaign literature, 1860--Republican.
Campaign literature--United States.
Hamlin, Hannibal, 1809-1891.
Lincoln, Abraham, 1809-1865
Lincoln, Abraham, 1809-1865--Political career before 1861.
Princeton subject headings:
Hamlin, Hannibal, 1809-1891.
Lincoln, Abraham, 1809-1865.