TY  - BOOK
AU  - Ayer,Alfred Jules
TI  - The problem of knowledge 
SN  - 014020377X
PY  - 1974///],c1956
CY  - Harmondsworth, England
PB  - Penguin Books Ltd. 
KW  - Knowledge, Theory of
KW  - Perception
KW  - Memory
N1  - Includes bibliographical references and index
ER  -