TY  - BOOK
AU  - Elster Jon
TI  - Logic and society:  Contradictions and possible worlds   
SN  - 0 471 99549 5
U1  - Sigma b4, L8 
PY  - 1978///
CY  - Chichester
PB  - John Wiley         
KW  - Social Science
N1  - Bibliography P 221-32
ER  -