TY  - BOOK
AU  - Copi, Irving M.
AU  - Cohen, Carl 
TI  - Introduction to logic
SN  - 9814009326
U1  - Res 160 C791 1998 
PY  - 1998///.
CY  - Singapore
PB  - Prentice-Hall, International, Inc.
KW  - Logic
N1  - Includes index
ER  -