TY  - BOOK
AU  - Ayer,A.J..
TI  - The problem of knowledge / 
T2  - Penguin philosophy, 
SN  - 0140135472
U1  - 001 
PY  - 1956/// rep 1990
CY  - London : 
PB  - Penguin Books , 
KW  - KNOWLEDGE
N1  - NULL
ER  -