Douglas, S. A. 1. (1860). Non-interference by Congress with slavery in the territories: Speech of Senator Douglas, of Illinois, delivered in the Senate of the United States, May 15 & 16, 1860. [S.l.: s.n.].

Douglas, Stephen A. 1813-1861. Non-interference By Congress With Slavery in the Territories: Speech of Senator Douglas, of Illinois, Delivered in the Senate of the United States, May 15 & 16, 1860. [S.l.: s.n.], 1860.

Douglas, Stephen A. 1813-1861. Non-interference By Congress With Slavery in the Territories: Speech of Senator Douglas, of Illinois, Delivered in the Senate of the United States, May 15 & 16, 1860. [S.l.: s.n.], 1860.