Sources

Lehner, Ernst. The Letterhead: History and Progress. New York: Museum
Books, Inc., 1955.

Weber, Wilhelm. A History of Lithography. New York: McGraw Hill, 1966.

The Encyclopedia of Southern Culture. Charles Reagan Wilson and WilliamFerris, coeditors; Ann J. Abadie and Mary L. Hart, associate editors.
Chapel Hill: University of North Carolina Press, 1989.