TY  - BOOK
AU  - Wolfram,Sybil
TI  - Philosophical logic: an introduction 
SN  - 0415023181 (pbk.)
U1  - 160 19
PY  - 1989///
CY  - London, New York
PB  - Routledge
KW  - Logic
N1  - Includes index; Bibliography: p. 263-269
UR  - http://www.loc.gov/catdir/enhancements/fy0648/88023963-d.html
ER  -