[en] [Gutenberg 2655] • The Papers and Writings of Abraham Lincoln — Volume 3: The Lincoln-Douglas Debates Independently Published
[en] [Gutenberg 3253] • The Papers and Writings of Abraham Lincoln, Complete Open Road Media
[en] [Gutenberg 2655] • The Papers and Writings of Abraham Lincoln — Volume 3: The Lincoln-Douglas Debates Independently Published
[en] [Gutenberg 3253] • The Papers and Writings of Abraham Lincoln, Complete Open Road Media