A Teacher's Tour of the Battle of Gettysburg (Matthew Pinsker/Gilder Lehrman Institute)
Battlefield Map (Library of Congress)
Gettysburg Address Teacher Resource (C-SPAN)
Gettysburg Civil War Photographs (Library of Congress)
On Lincoln's Mind: Leading the Nation to the Gettysburg Address (Papers of Abraham Lincoln)
Wills, Garry. Lincoln at Gettysburg: The Words That Remade America. Touchstone Books, 1993.