TY  - BOOK
AU  - Wolfram, Sybil
TI  - Philosophical logic : an introduction
SN  - 9780415023184
SN  - 88023963
U1  - 168 WOL 
PY  - 1989///
CY  - London ; New York
PB  - Routledge
KW  - Logic
N1  - Includes index. Bibliography: p. 263-269
ER  -