TY  - BOOK
AU  - Jeffrey,Richard  .
TI  - Formal Logic : its scope and limits / 
SN  - 0070323216
U1  - 160 
PY  - 1989///
CY  - NewDelhi : 
PB  - McGraw-Hill Book , 
KW  - LOGIC
N1  - PB; Includes index and bibliographical references
ER  -