TY  - BOOK
AU  - Agapay, Ramon B.
TI  - Logic: the essentials of deductive reasoning 
SN  - 9710848917
AV  - BC 71 .Ag259 2005
PY  - 2005///
CY  - Metro Manila : 
PB  - National Book Store, 
N1  - EDU
ER  -