TY  - BOOK
AU  - Seiffert,Helmut
AU  - Diorki
TI  - Introduccion a la logica
AV  - BC114 .S458
PY  - 1977///
CY  - Barcelona
PB  - Herder
KW  - Logic
KW  - Local
KW  - Logic, Symbolic and mathematical
N1  - Translated from Einfuhrung in die Logik; Includes bibliography
ER  -