TY  - BOOK
AU  - Hempel, C.
TI  - Philosophy of natural science
SN  - 9780136638230
U1  - 101.1:5 
PY  - 1966///
CY  - New Jersey
PB  - Prentice
KW  - NATURAL SCIENCE
KW  - PHILOSOPHY
KW  - PHILOSOPHY OF SCIENCE
ER  -