TY  - BOOK
AU  - Grayling,A.C.
TI  - An Introduction to philosophical logic / 
SN  - 0-7156-2353-2
PY  - 1990///
CY  - London : 
PB  - Duckworth, 
KW  - Lógica
N1  - Indice; Bibliogr.: p. [295]-300
ER  -