Curious Woodcuts of Fanciful and Real Beasts; A Selection of 190 Sixteenth-Century Woodcuts from Gesner's and Topsell's Natural Histories [by] Konrad Gesner. New York: Dover Publications, [1971].

The Dictionary of National Biography: From the Earliest Times to 1900. London: Oxford University Press, 1921-1922. [Edward Topsell entry]

Gesner, Konrad. Beasts & animals in decorative woodcuts of the Renaissance. New York: Dover Publications, 1983.

Willy Ley. Introduction to The History of Four-footed Beasts and Serpents and Insects. New York: Da Capo Press, 1967.

Zeydel, Edwin H. Sebastian Brant. New York: Twayne Publishers, Inc., 1967.

The Simon & Schuster Encyclopedia of Animals: A Visual Who's Who of the World's Creatures. New York: Simon & Schuster, 1998.

Dave's Mythical Creatures and Places
http://www.eaudrey.com/myth/index.html

The Medieval Bestiary: Animals in the Middle Ages
http://bestiary.ca/