TY  - BOOK
AU  - Wittgenstein,Ludwig
AU  - Wittgenstein,Ludwig
TI  - Preliminary studies for the 'Philosophical investigations',: generally known as the Blue and Brown books
SN  - 063111890X
AV  - B3376.W563 P6 1969
U1  - 149/.94 
PY  - 1969///
CY  - Oxford
PB  - Blackwell
ER  -