Artwork, logos, and presentation are product identity, as defined in the Open Game License 1.0a, Section 1(e), and are not Open Content DESIGNATION OF OPEN GAME CONTENT The game mechanics of Monster & Magiare Open Game Content, as defined in the Open Game License version 1.0a Section 1(d). No portion
Lewis, Cherry: The Dating Game: One Man's Search for the Age of the Earth. Cambridge: Cambridge University Press, 2000. Lewis, John S.: Rain of Iron London: Penguin Books, 1995. McGhee, George R.: The Late Devonian Mass Extinction: The Frasnian/Famennian Crisis. New York: Columbia University Press, 1996.