Simon, L. M. (1964). Gettysburg--1963: An account of the centennial commemoration. Report of the One Hundredth Anniversary of the Battle of Gettysburg and Lincoln's Gettysburg Address Commission to the General Assembly. Harrisburg.

Simon, Louis M. Gettysburg--1963: An Account of the Centennial Commemoration. Report of the One Hundredth Anniversary of the Battle of Gettysburg and Lincoln's Gettysburg Address Commission to the General Assembly. Harrisburg, 1964.

Simon, Louis M. Gettysburg--1963: An Account of the Centennial Commemoration. Report of the One Hundredth Anniversary of the Battle of Gettysburg and Lincoln's Gettysburg Address Commission to the General Assembly. Harrisburg, 1964.