TY  - BOOK
AU  - Cohen,Morris Raphael
AU  - Nagel,Ernest
TI  - Logic: an introduction to 
PY  - 1963///
CY  - London
PB  - Routledge & Kegan Paul
KW  - Logic
KW  - Methodology
N1  - This edition contains only the first part of the original text first published in 1934 under title: An introduction to logic and scientific method
ER  -