Webster's New World Medical Dictionary, Fully Revised and Updated
Webmd
Plato: Political Philosophy
Malcolm Schofield
Habermas: A Guide for the Perplexed
Lasse Thomassen
Who's Who in the Twentieth Century
Unknown
Word by Word Picture Dictionary
Steven J. Molinsky & Bill Bliss & Richard E. Hill
The Encyclopedia of World Cultures: South America
Yale University Staff