TY  - BOOK
AU  - Gualdo, Rosendo S., author.
TI  - Logic: the basics of correct reasoning 
SN  - 9718210040
U1  - DFil 160 2000
PY  - 2000///
CY  - Valenzuela City
PB  - Mutya Publishig House
KW  - Logic
N1  - Includes bibliographical references
ER  -