TY  - BOOK
AU  - Cohen,Morris R.
AU  - Nagel,Ernest
TI  - An introduction to logic and scientific method
U1  - 160 
PY  - 1934///]
CY  - New York
PB  - Harcourt, Brace and company
KW  - Logic
KW  - Methodology
N1  - "First edition."; Includes bibliographies
ER  -