Catton, B.   The Battle of Gettysburg,   American Heritage Publishing Co., 1963. 

Hakim, J.  A History of US War, Terrible War,  Oxford University Press, 1994. 

Carter, A.  The Battle of Gettysburg, New York, 1990. 

The American Heritage Picture History of the Civil War, American Heritage Publishing Co, Inc. 1960. 

Webpages 

http://icorps.com/uleft.html 

http://www.oswego.edu 
Movie Gettysburg A Turner Production 1993