TY  - BOOK
AU  - Copi,Irving M.
AU  - Cohen,Carl
TI  - Introduction to logic
SN  - 8178084864
U1  - 160 21
PY  - 1998///
CY  - Delhi
PB  - Pearson Education
KW  - Logic
KW  - Textbooks
N1  - Includes bibliographical references and indexes
ER  -