TY  - BOOK
AU  - Copi,Irving M.
AU  - Cohen,Carl
TI  - Introduction to logic
SN  - 0023250356
AV  - BC108 .C69 1990
U1  - 160 20
PY  - 1990///
CY  - New York, London
PB  - Macmillan, Collier Macmillan
KW  - Logic
KW  - Textbooks
N1  - Includes bibliographical references
ER  -