Gettysburg staff ride briefing book. - U.S. Army Center of Military History [1993?] - [1], 72 p. ill., maps. Subjects--Topical Terms: Gettysburg, Battle of, Gettysburg, Pa., 1863.Staff rides--Pennsylvania--Gettysburg. GPO Item No.: 0344 Gov. Doc. Class. No.: D 114.2:G 33