Bibliography of the Writings of Clarence Irving Le
A definitive list, from the Pragmatism Cybrary.
Biography.com: Lewis, Clarence Irving
Concise biographical paragraph.
Clarence Irving Lewis
A scholarly treatment of this pragmatist thinker, by Eric Dayton. From the Internet Encyclopedia of Philosophy.
Lewis, Clarence Irving
Short entry from the 2001 Columbia Encyclopedia.
Terry Peterson's Essays
Three essays to facilitate the understanding of C.I. Lewis's thought. Includes a page-by-page annotation of Mind and the World Order.