TY  - BOOK
AU  - Copi, Irving M,  Cohen, Carl
TI  - Introduction to logic
SN  - 8120309421
U1  - 160 
PY  - 1994///
CY  - New Delhi
PB  - Prentice Hall of India
N1  - Glossary and index of logical terms, index of name and titles
ER  -