Columbia subject headings:
Harvard subject headings:
Gettysburg, Battle of, Gettysburg, Pa., 1863
Princeton subject headings:
Gettysburg Campaign, 1863.
Gettysburg, Battle of, Gettysburg, Pa., 1863.
Pennsylvania--History--Civil War, 1861-1865--Campaigns.
United States--History--Civil War, 1861-1865.