Lincoln, A. (1864). The opinions of Abraham Lincoln, upon slavery and its issues: Indicated by his speeches, letters, messages, and proclamations. [Washington: Printed by L. Towers for the Union congressional committee.

Lincoln, Abraham. The Opinions of Abraham Lincoln, Upon Slavery and Its Issues: Indicated By His Speeches, Letters, Messages, and Proclamations. [Washington: Printed by L. Towers for the Union congressional committee, 1864.

Lincoln, Abraham. The Opinions of Abraham Lincoln, Upon Slavery and Its Issues: Indicated By His Speeches, Letters, Messages, and Proclamations. [Washington: Printed by L. Towers for the Union congressional committee, 1864.