TY  - BOOK
AU  - Wittgenstein Ludwig
TI  - Preliminary studies for the  Philosophical investigations generally known as the blue and brown books
U1  - R3xM891,1, K9;P3 
PY  - 2003///
CY  - USA
PB  - Blackwell Publishing      
KW  - PHILOSOPHY
N1  - Preliminary studies for the  Philosophical investigations investigations
ER  -