primer:
Language, Saussure and Wittgenstein; How to Play Games with Words (Routledge History of Linguistic Thought) by Roy Harris
a good article on Wittgenstein can be found at Oregon State's site
http://oregonstate.edu/instruct/phl2...tgenstein.html
source material:
Tractatus Logico-Philosophicus
by
Ludwig Wittgenstein