TY  - BOOK
AU  - Cohen,Morris Raphael
AU  - Nagel,Ernest
TI  - An introduction to logic
U1  - 160 
PY  - 1963/// [Reprinted 1966]
CY  - London
PB  - Routledge and Kegan Paul
KW  - Logic
KW  - Methodology
N1  - Includes index
ER  -