1. Map of the battlefield of Pea Ridge, Arkansas, showing the positions of the United States and Confederate forces on the 8th of March 1862 Maps Pennsylvania State University Public content 1862. United States. Army. Corps of Engineers. Pea Ridge, Battle of, Ark., 1862--Maps.
2. Military reconnaissance of the Arkansas, Rio del Norte and Rio Gila Maps Pennsylvania State University Public content 1846. United States. Army. Corps of Topographical Engineers. Arkansas River--Maps.