Langer, Susanne K.
An introduction to symbolic logic - 3a. ed. rev. - New York : Dover Publications Inc. , 1967 - 367 p.
0-486-60164-1
LÓGICA
511.3
An introduction to symbolic logic - 3a. ed. rev. - New York : Dover Publications Inc. , 1967 - 367 p.
0-486-60164-1
LÓGICA
511.3