Plum, W. R. (1882). The military telegraph during the Civil War in the United States: With an exposition of ancient and modern means of communication, and of the federal and Confederate cipher systems ; also a running account of the war between the states. Chicago: Jansen, McClurg & Co..

Plum, William Rattle. The Military Telegraph During the Civil War in the United States: With an Exposition of Ancient and Modern Means of Communication, and of the Federal and Confederate Cipher Systems ; Also a Running Account of the War between the States. Chicago: Jansen, McClurg & Co., 1882.

Plum, William Rattle. The Military Telegraph During the Civil War in the United States: With an Exposition of Ancient and Modern Means of Communication, and of the Federal and Confederate Cipher Systems ; Also a Running Account of the War between the States. Chicago: Jansen, McClurg & Co., 1882.