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Sources used in the construction of the timelines include:

Content

Irving Fang, A History of Mass Communication: Six Information Revolutions, Focal Press,1997.

David Crowley and Paul Heyer, Communication in History, Longman, 1993.

Michael Olmert, The Smithsonian Book of Books. Wings Books, 1992.

J.E. Zimmerman, Dictionary of Classical Mythology, Bantam, 1964.

Gallery Illustrations

Treasures of 19th- and 20th-Century Painting. The Art Institute of Chicago. 1993.

Alexander Marshack, "The Art and Symbols of Ice Age Man," in David Crowley and Paul Heyer, eds., Communication in History, Longman, 1993.

Michael Olmert, The Smithsonian Book of Books. Wings Books, 1992.

Peter Pollack, The Picture History of Photography. Harry N. Abrams.

Helmut Gernsheim, The Origins of Photography. Thames and Hudson. 1982.

Fine Art Reproductions of Old and Modern Masters. New York Graphic Society. 1980.

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