TY  - BOOK
AU  - Jeffrey,Richard  C., x
AU  - x
TI  - Formal  logic  its  scope  and  limits: x
SN  - x  
U1  - 160/JEF 
PY  - 1967///
CY  - N, Y.
PB  - Mc Graw-Hill
KW  - Logic
ER  -