TY  - BOOK
AU  - Langer, Susanne.
TI  - Introd to symbolic logic
SN  - (N.A.) :
U1  - T 511.3   21
PY  - 1953///
CY  - New York
PB  - Daver Publications
KW  - Logic, symbolic and mathematical
KW  - Mathematical (Symbolic) logic
KW  - Philosophy
KW  - Logic
N1  - Includes index
ER  -