TY  - BOOK
AU  - Copi, Irving M.
TI  - Symbolic logic,
U1  - 511.3 
PY  - 1973///
CY  - New York
PB  - Macmillan
KW  - Logic, Symbolic and Mathematics
KW  - Symbolic and Mathematics Logic
KW  - Mathematical Logic
KW  - Algebra of Logic
ER  -