TY  - BOOK
AU  - Langer,Susanne Katherina Knauth
TI  - IntroducciÃ³n a la lÃ³gica simbÃ³lica
PY  - 1977///
CY  - MÃ©xico
PB  - Siglo XXI
KW  - Logic, Symbolic and mathematical
KW  - Local
N1  - Translation of: An introduction to symbolic logic; Bibliography: p. 303-308
ER  -