TY  - BOOK
AU  - Cruz, Corazon L.
TI  - Introduction to logic
SN  - 971-08-5496-8
U1  - Fil. 160 C957 1993 
PY  - 1993///
CY  - Manila
PB  - National Book Store, 
KW  - Logic
N1  - includes bibliographies and index
ER  -