TY  - BOOK
AU  - Lewis,Clarence Irving
AU  - Langford,Cooper Harold
TI  - Symbolic logic
SN  - 0486601706 (pbk) :
U1  - 164 
PY  - 1959///
CY  - New York
PB  - Dover Publications
KW  - Logic, Symbolic and mathematical
N1  - Includes index
ER  -