TY  - BOOK
AU  - Agapay,Ramon B.
TI  - Logic : : the essentials of deductive reasoning 
SN  - 971-08-4891-7
U1  - Fil 160 Ag151e 1991  
PY  - 1991///
CY  - Mandaluyong City
PB  - National Book Store, 
N1  - Includes bibliographical references.; 100-199
ER  -