TY  - BOOK
AU  - Ayer,A.J.
TI  - The problem of knowledge
T2  - Penguin philosophy
SN  - 0140135472
PY  - 1990///, c1956
CY  - London
PB  - Penguin Books
KW  - Knowledge, Theory of
N1  - Includes index; Includes index
ER  -