TY  - BOOK
AU  - Jaques Elliott,
TI  - Levels of abstraction in logic and human action
SN  - 0435822802
U1  - 153.24 
PY  - 1978///
CY  - laondon
PB  - HHeinemann
KW  - Logic, Symbolic and mathematical
KW  - Thought and thinking
N1  - Include Index
ER  -