TY  - BOOK
AU  - Copi,Irving M.
TI  - Symbolic logic
SN  - 0023249803
AV  - BC135 .C58 1979 
U1  - 511/.3 
PY  - 1979///
CY  - New York
PB  - Macmillan
KW  - Logic, Symbolic and mathematical
N1  - Includes bibliographical references and index
ER  -