(Commemorative Edition for Expo'70 ed.). Chicago: William Benton. p. 774. ISBN 978-0-85229-135-1. "Large Lakes of the World". factmonster.com. Cordell, Linda S.; Lightfoot...
Vol. 7 (Expo '70 hardcover ed.). William Benton. pp. 215–23. ISBN 978-0-85229-135-1. Wilson, N.G. (2006). Encyclopedia of ancient Greece. New York: Routledge...