TY  - BOOK
AU  - Cohen,Morris R.
AU  - Ernest Nagel
TI  - An introduction to logic and scientific method
AV  - BC108.C67 
PY  - 1934///
CY  - New York
PB  - : Harcourt, Brace and Company
KW  - Logic
KW  - Methodology
N1  - Includes bibliographical references and index
ER  -